1 00:00:08,710 --> 00:00:06,630 what is the vanishing and appearance 2 00:00:10,549 --> 00:00:08,720 sources during a century of observations 3 00:00:11,589 --> 00:00:10,559 really about 4 00:00:14,549 --> 00:00:11,599 well 5 00:00:18,790 --> 00:00:14,559 let me be clear it's about et we want to 6 00:00:19,750 --> 00:00:18,800 find dt and et and extraterrestrials 7 00:00:21,670 --> 00:00:19,760 have been 8 00:00:23,269 --> 00:00:21,680 the motivator for 9 00:00:25,029 --> 00:00:23,279 uh our searches 10 00:00:27,029 --> 00:00:25,039 although we don't only do searches for 11 00:00:29,269 --> 00:00:27,039 et we we have a little bit of this 12 00:00:31,669 --> 00:00:29,279 policy of that whatever we find we will 13 00:00:33,510 --> 00:00:31,679 publish even if it's conventional 14 00:00:36,150 --> 00:00:33,520 astronomical phenomena we will publish 15 00:00:39,750 --> 00:00:38,229 so traditionally 16 00:00:40,950 --> 00:00:39,760 um 17 00:00:43,590 --> 00:00:40,960 there have been 18 00:00:44,389 --> 00:00:43,600 very few ways to look for et 19 00:00:45,830 --> 00:00:44,399 and 20 00:00:47,270 --> 00:00:45,840 people have been thinking so why should 21 00:00:49,110 --> 00:00:47,280 we look for them because we don't know 22 00:00:51,189 --> 00:00:49,120 if they exist we have we don't have any 23 00:00:53,430 --> 00:00:51,199 signature nothing that would indicate 24 00:00:55,510 --> 00:00:53,440 that any other civilization 25 00:00:58,470 --> 00:00:55,520 is out there well i'm just going to 26 00:01:01,110 --> 00:00:58,480 remind about that there are like 200 to 27 00:01:03,029 --> 00:01:01,120 300 billion of stars just in our milky 28 00:01:05,109 --> 00:01:03,039 way our own galaxy 29 00:01:07,590 --> 00:01:05,119 and there's about 400 billion galaxies 30 00:01:09,190 --> 00:01:07,600 just in the observable universe 31 00:01:11,350 --> 00:01:09,200 and we know that 32 00:01:11,910 --> 00:01:11,360 like 33 00:01:15,109 --> 00:01:11,920 it's maybe 34 00:01:18,310 --> 00:01:15,119 as much as 50 of all stellar systems 35 00:01:21,190 --> 00:01:18,320 have our earth like planets orbiting 36 00:01:24,310 --> 00:01:21,200 so we have very many candidate planets 37 00:01:28,469 --> 00:01:24,320 that could be um hosting some type of 38 00:01:30,149 --> 00:01:28,479 civilization or some more primitive life 39 00:01:32,710 --> 00:01:30,159 so i think there are good reasons to 40 00:01:33,990 --> 00:01:32,720 look for it 41 00:01:35,830 --> 00:01:34,000 traditionally 42 00:01:38,069 --> 00:01:35,840 most of these searches have been done in 43 00:01:40,390 --> 00:01:38,079 radio i don't know if many of you have 44 00:01:41,830 --> 00:01:40,400 seen this movie called contact that is a 45 00:01:44,149 --> 00:01:41,840 wonderful movie 46 00:01:46,789 --> 00:01:44,159 about a researcher that is looking for 47 00:01:49,749 --> 00:01:46,799 et with a radio telescope 48 00:01:51,990 --> 00:01:49,759 it's a great method except for 49 00:01:53,749 --> 00:01:52,000 that it's very very costly because you 50 00:01:55,350 --> 00:01:53,759 need to 51 00:01:57,830 --> 00:01:55,360 search for or 52 00:01:59,990 --> 00:01:57,840 you need to observe the same star during 53 00:02:01,109 --> 00:02:00,000 years and years 54 00:02:02,389 --> 00:02:01,119 of time 55 00:02:03,990 --> 00:02:02,399 and you don't know which one of all 56 00:02:05,670 --> 00:02:04,000 these stars that you're looking for is 57 00:02:06,950 --> 00:02:05,680 going to actually cost that life that 58 00:02:10,550 --> 00:02:06,960 intelligent life that could be 59 00:02:11,990 --> 00:02:10,560 transmitting clear-cut radio signals 60 00:02:13,110 --> 00:02:12,000 now there are other ways of doing that 61 00:02:14,390 --> 00:02:13,120 too 62 00:02:16,390 --> 00:02:14,400 for instance 63 00:02:19,670 --> 00:02:16,400 anomalies and when you search for 64 00:02:21,670 --> 00:02:19,680 anomalies you might actually not find it 65 00:02:24,740 --> 00:02:21,680 but you might find something else 66 00:02:25,990 --> 00:02:24,750 let's say when one first and discovered 67 00:02:29,589 --> 00:02:26,000 [Music] 68 00:02:33,110 --> 00:02:29,599 the first quasar is the 3c 273 that is 69 00:02:35,589 --> 00:02:33,120 here depicted on the image in the middle 70 00:02:37,830 --> 00:02:35,599 so a quasar is a supermassive black hole 71 00:02:39,910 --> 00:02:37,840 that is accreting lots of gas and emits 72 00:02:41,910 --> 00:02:39,920 lots lots of luminous 73 00:02:42,869 --> 00:02:41,920 um very very strong light from the 74 00:02:45,110 --> 00:02:42,879 center 75 00:02:46,470 --> 00:02:45,120 and when one first saw it once one 76 00:02:48,630 --> 00:02:46,480 thought it was a star and then one 77 00:02:50,390 --> 00:02:48,640 started taking a spectre of the star i 78 00:02:51,910 --> 00:02:50,400 said something is wrong with this star 79 00:02:53,030 --> 00:02:51,920 this star looks like it's not in our 80 00:02:55,430 --> 00:02:53,040 galaxy 81 00:02:57,430 --> 00:02:55,440 and this is how finding an anomaly led 82 00:03:00,309 --> 00:02:57,440 to a really important discovery we 83 00:03:01,830 --> 00:03:00,319 discovered these super accreting black 84 00:03:03,190 --> 00:03:01,840 holes 85 00:03:04,949 --> 00:03:03,200 in this way 86 00:03:07,430 --> 00:03:04,959 so that's one example 87 00:03:09,110 --> 00:03:07,440 another example is that the one one 88 00:03:11,589 --> 00:03:09,120 discovered the posters 89 00:03:13,670 --> 00:03:11,599 uh in astronomy one first thought 90 00:03:15,830 --> 00:03:13,680 this this looks like aliens someone said 91 00:03:18,470 --> 00:03:15,840 because it looks like periodic radio 92 00:03:19,270 --> 00:03:18,480 signals coming from these weird stars 93 00:03:20,949 --> 00:03:19,280 and 94 00:03:23,750 --> 00:03:20,959 well one discovered a new type of 95 00:03:25,430 --> 00:03:23,760 objects it wasn't easy the time either 96 00:03:28,229 --> 00:03:25,440 but it was super interesting and it led 97 00:03:30,550 --> 00:03:28,239 to a nobel prize 98 00:03:32,710 --> 00:03:30,560 and another object you might have read a 99 00:03:35,509 --> 00:03:32,720 lot about in the media is tabistar which 100 00:03:37,350 --> 00:03:35,519 is a star that has been doing some weird 101 00:03:38,710 --> 00:03:37,360 very slow type of dimming in the last 102 00:03:40,149 --> 00:03:38,720 hundred years 103 00:03:41,670 --> 00:03:40,159 and so far 104 00:03:44,470 --> 00:03:41,680 nobody knows what is causing this 105 00:03:48,149 --> 00:03:44,480 dimming really one thing is some type of 106 00:03:49,589 --> 00:03:48,159 dust but when it was discovered in 2016 107 00:03:51,430 --> 00:03:49,599 the first thought was 108 00:03:54,149 --> 00:03:51,440 could it be some type of mega structure 109 00:03:55,030 --> 00:03:54,159 some big alien structures 110 00:04:01,429 --> 00:03:55,040 like 111 00:04:03,990 --> 00:04:01,439 we don't know yet but 112 00:04:07,030 --> 00:04:04,000 we are still going to find out no 113 00:04:08,630 --> 00:04:07,040 signal of et has been found there yet 114 00:04:11,270 --> 00:04:08,640 and finally i think many of you have 115 00:04:12,949 --> 00:04:11,280 heard about the omoamoa object 116 00:04:14,710 --> 00:04:12,959 that 117 00:04:16,150 --> 00:04:14,720 has been figuring a lot in the media in 118 00:04:18,229 --> 00:04:16,160 the last two years 119 00:04:19,909 --> 00:04:18,239 uh where some people 120 00:04:22,950 --> 00:04:19,919 propose that this could actually be a 121 00:04:24,550 --> 00:04:22,960 space rocket and not a natural object 122 00:04:27,030 --> 00:04:24,560 and uh 123 00:04:28,710 --> 00:04:27,040 we again ask is it aliens it might be so 124 00:04:30,870 --> 00:04:28,720 that it's aliens this time or it will 125 00:04:33,510 --> 00:04:30,880 turn out to be some type of new anomaly 126 00:04:36,870 --> 00:04:33,520 that we will learn from so looking for 127 00:04:38,790 --> 00:04:36,880 anomalies is our really good start 128 00:04:40,950 --> 00:04:38,800 and even if we don't find it we can find 129 00:04:43,830 --> 00:04:40,960 something else 130 00:04:45,350 --> 00:04:43,840 so now in the vasco project we are 131 00:04:47,270 --> 00:04:45,360 interested in 132 00:04:48,629 --> 00:04:47,280 anomalies but we are not only interested 133 00:04:50,710 --> 00:04:48,639 in anomalies 134 00:04:52,230 --> 00:04:50,720 uh we were thinking about that how about 135 00:04:53,909 --> 00:04:52,240 if you look for something that would be 136 00:04:55,350 --> 00:04:53,919 absolutely impossible 137 00:04:57,510 --> 00:04:55,360 something that would look like magic in 138 00:05:00,070 --> 00:04:57,520 in the eyes of us physicists that would 139 00:05:01,110 --> 00:05:00,080 say like no that cannot happen naturally 140 00:05:03,110 --> 00:05:01,120 and 141 00:05:04,710 --> 00:05:03,120 maybe we can target our searches to look 142 00:05:05,590 --> 00:05:04,720 for this magic 143 00:05:08,070 --> 00:05:05,600 in 144 00:05:10,629 --> 00:05:08,080 big sets of data 145 00:05:12,870 --> 00:05:10,639 because if you find something you either 146 00:05:15,189 --> 00:05:12,880 find a new astrophysical phenomena that 147 00:05:17,430 --> 00:05:15,199 will kill some dogma and you're happy 148 00:05:20,150 --> 00:05:17,440 or you actually might find that 149 00:05:22,390 --> 00:05:20,160 technology that you're looking for 150 00:05:24,629 --> 00:05:22,400 and this is is the basics for the vasco 151 00:05:27,189 --> 00:05:24,639 project where we are actually focusing 152 00:05:29,189 --> 00:05:27,199 our searches on vanishing stars 153 00:05:30,310 --> 00:05:29,199 because we know that if a star dies 154 00:05:33,110 --> 00:05:30,320 either it 155 00:05:35,909 --> 00:05:33,120 like explodes in a bright supernova or 156 00:05:36,710 --> 00:05:35,919 it's during billions of years fades into 157 00:05:46,310 --> 00:05:36,720 a 158 00:05:49,909 --> 00:05:46,320 collection 159 00:05:51,749 --> 00:05:49,919 we're comparing images from the 1950s 160 00:05:53,990 --> 00:05:51,759 before any satellites were in the sky 161 00:05:56,390 --> 00:05:54,000 when our sky was completely without any 162 00:05:58,950 --> 00:05:56,400 human contamination we compared these 163 00:06:00,309 --> 00:05:58,960 images from the 50s with images from how 164 00:06:02,309 --> 00:06:00,319 how the star 165 00:06:05,110 --> 00:06:02,319 the sky looks today 166 00:06:07,189 --> 00:06:05,120 and we collect all this data we look we 167 00:06:09,270 --> 00:06:07,199 compare the images and 168 00:06:11,909 --> 00:06:09,280 the catalogs and we see has something 169 00:06:13,909 --> 00:06:11,919 vanished possibly 170 00:06:15,590 --> 00:06:13,919 and with that we are actually finding a 171 00:06:18,070 --> 00:06:15,600 lot of natural objects 172 00:06:19,909 --> 00:06:18,080 natural so-called transients transient 173 00:06:23,189 --> 00:06:19,919 is a transit is an event that is very 174 00:06:24,629 --> 00:06:23,199 short in astronomy let's say a supernova 175 00:06:26,870 --> 00:06:24,639 or um 176 00:06:28,469 --> 00:06:26,880 so-called gamma reverse sun something 177 00:06:29,749 --> 00:06:28,479 that lasts for just a few minutes and 178 00:06:31,510 --> 00:06:29,759 you see it 179 00:06:34,950 --> 00:06:31,520 so we collect a lot of natural 180 00:06:36,550 --> 00:06:34,960 transients by by doing this and we also 181 00:06:41,350 --> 00:06:36,560 collect a lot of 182 00:06:43,189 --> 00:06:41,360 transients let's say quasars that are 183 00:06:45,990 --> 00:06:43,199 having some type of variability that can 184 00:06:47,510 --> 00:06:46,000 last for years 185 00:06:49,110 --> 00:06:47,520 so these are the natural things that we 186 00:06:52,469 --> 00:06:49,120 collect but we also 187 00:06:54,870 --> 00:06:52,479 hope to find so-called dyson spheres 188 00:06:56,790 --> 00:06:54,880 um around stars where let's say a 189 00:06:59,990 --> 00:06:56,800 civilization might have built a shell 190 00:07:02,070 --> 00:07:00,000 around the star and gradually it themes 191 00:07:03,990 --> 00:07:02,080 and we hope to find maybe some vanishing 192 00:07:05,749 --> 00:07:04,000 star that has been 193 00:07:09,029 --> 00:07:05,759 um manipulated through stellar 194 00:07:10,309 --> 00:07:09,039 engineering or even appearing stars 195 00:07:12,710 --> 00:07:10,319 i i'm 196 00:07:15,350 --> 00:07:12,720 i'm very proud of to say that this image 197 00:07:17,029 --> 00:07:15,360 of the green little 198 00:07:19,110 --> 00:07:17,039 aliens was actually published in an 199 00:07:21,270 --> 00:07:19,120 astronomical journal i never expected it 200 00:07:26,309 --> 00:07:21,280 to happen but we got it published with 201 00:07:32,070 --> 00:07:28,870 so yes this is what we all are looking 202 00:07:34,309 --> 00:07:32,080 for and we collect all of this stuff and 203 00:07:38,629 --> 00:07:34,319 we hope that to eventually find this 204 00:07:43,670 --> 00:07:39,909 so 205 00:07:46,230 --> 00:07:43,680 scientific opportunities yes there are 206 00:07:49,270 --> 00:07:46,240 some people who say that according to a 207 00:07:51,430 --> 00:07:49,280 few theories certain stars within a very 208 00:07:53,270 --> 00:07:51,440 defined mass range might collapse 209 00:07:54,790 --> 00:07:53,280 directly into black holes 210 00:07:55,990 --> 00:07:54,800 nobody knows if these theories are 211 00:07:58,070 --> 00:07:56,000 correct 212 00:08:00,550 --> 00:07:58,080 and we know that it's extremely unlikely 213 00:08:01,350 --> 00:08:00,560 that it will happen in the milky way 214 00:08:05,110 --> 00:08:01,360 so 215 00:08:07,749 --> 00:08:05,120 be equally cool for us as well because 216 00:08:08,950 --> 00:08:07,759 that would um bring a lot of light to 217 00:08:11,029 --> 00:08:08,960 supernova 218 00:08:13,029 --> 00:08:11,039 physics 219 00:08:15,029 --> 00:08:13,039 and as i also mentioned the quasars 220 00:08:17,270 --> 00:08:15,039 which is my other research field 221 00:08:18,309 --> 00:08:17,280 and these super massive accreting black 222 00:08:19,270 --> 00:08:18,319 holes 223 00:08:21,350 --> 00:08:19,280 um 224 00:08:23,110 --> 00:08:21,360 one can also find some of them that show 225 00:08:27,990 --> 00:08:23,120 long-term variability 226 00:08:30,070 --> 00:08:28,000 things would be fantastic in order to 227 00:08:32,310 --> 00:08:30,080 actually know 228 00:08:34,550 --> 00:08:32,320 like dismiss and reject a lot of 229 00:08:36,230 --> 00:08:34,560 current theories about 230 00:08:37,589 --> 00:08:36,240 the engine of the quasars because i can 231 00:08:41,269 --> 00:08:37,599 say that there's a very poor 232 00:08:43,670 --> 00:08:41,279 understanding of the engine so far so 233 00:08:47,030 --> 00:08:43,680 even if we find this we will do 234 00:08:50,070 --> 00:08:47,040 we will get something nice out of it 235 00:08:52,070 --> 00:08:50,080 so our first official paper there was 236 00:08:52,829 --> 00:08:52,080 one more earlier but the official paper 237 00:08:57,269 --> 00:08:52,839 was in 238 00:08:59,269 --> 00:08:57,279 2020 and we found 150 000 candidates 239 00:09:01,670 --> 00:08:59,279 just based on the text 240 00:09:03,750 --> 00:09:01,680 and catalogues 241 00:09:05,910 --> 00:09:03,760 and the problem was that with these 150 242 00:09:08,550 --> 00:09:05,920 000 of images one had to look through 243 00:09:11,110 --> 00:09:08,560 them one by one by eye 244 00:09:13,670 --> 00:09:11,120 looking through 150 000 images by eye is 245 00:09:15,990 --> 00:09:13,680 not an easy task i looked through 24 000 246 00:09:18,550 --> 00:09:16,000 it took three months lots of chocolates 247 00:09:19,990 --> 00:09:18,560 i lost one and i i got one dietary more 248 00:09:21,350 --> 00:09:20,000 in my 249 00:09:22,949 --> 00:09:21,360 myopia 250 00:09:26,870 --> 00:09:22,959 and 251 00:09:29,910 --> 00:09:26,880 what we when i looked through 24 000 of 252 00:09:31,590 --> 00:09:29,920 objects i found 100 unusual transients 253 00:09:33,590 --> 00:09:31,600 that were very short 254 00:09:36,790 --> 00:09:33,600 and i did not find any clear candidate 255 00:09:39,590 --> 00:09:36,800 of a vanishing star so far but 256 00:09:41,350 --> 00:09:39,600 um it was an interesting start 257 00:09:43,670 --> 00:09:41,360 here i show examples of the things that 258 00:09:44,790 --> 00:09:43,680 i found when i look through the 24 000 259 00:09:46,389 --> 00:09:44,800 of the 260 00:09:48,230 --> 00:09:46,399 candidates 261 00:09:50,870 --> 00:09:48,240 you see here are beautiful 262 00:09:53,990 --> 00:09:50,880 objects in the image from the 1950 this 263 00:09:55,430 --> 00:09:54,000 is a red image and it's not there later 264 00:09:57,030 --> 00:09:55,440 this is another 265 00:10:00,470 --> 00:09:57,040 time in the 80s 266 00:10:02,949 --> 00:10:00,480 here we have it in 2005 and 2015. so you 267 00:10:05,910 --> 00:10:02,959 only see that event in 268 00:10:08,470 --> 00:10:07,509 here's another example you see something 269 00:10:11,190 --> 00:10:08,480 here 270 00:10:13,590 --> 00:10:11,200 in the 50s you don't see it as much but 271 00:10:17,350 --> 00:10:13,600 it still is seen in the 80s 272 00:10:21,350 --> 00:10:19,670 and hundreds of these type of 273 00:10:23,190 --> 00:10:21,360 events were found 274 00:10:25,350 --> 00:10:23,200 and we think that they are 275 00:10:27,030 --> 00:10:25,360 natural astrophysical phenomena although 276 00:10:30,710 --> 00:10:27,040 we don't know yet what they are because 277 00:10:31,829 --> 00:10:30,720 we need to do follow-up observations 278 00:10:33,910 --> 00:10:31,839 and 279 00:10:35,910 --> 00:10:33,920 to explore all the other ones we started 280 00:10:37,829 --> 00:10:35,920 up a citizen science projects and that 281 00:10:39,590 --> 00:10:37,839 was has has been done together with 282 00:10:42,550 --> 00:10:39,600 machine learning scientists 283 00:10:45,110 --> 00:10:42,560 image analysis researchers actually 284 00:10:47,590 --> 00:10:45,120 game developers and astronomers 285 00:10:49,350 --> 00:10:47,600 and we have introduced the first 150 000 286 00:10:52,630 --> 00:10:49,360 of candidates that were purely based on 287 00:10:56,069 --> 00:10:54,069 so 288 00:10:58,710 --> 00:10:56,079 here is how it looks and if you want to 289 00:11:01,110 --> 00:10:58,720 see the citizen science project you can 290 00:11:04,310 --> 00:11:01,120 go here it has a random number generator 291 00:11:05,670 --> 00:11:04,320 currently that is spitting out a mission 292 00:11:07,430 --> 00:11:05,680 number and 293 00:11:09,590 --> 00:11:07,440 there's also an ai 294 00:11:12,389 --> 00:11:09,600 and eventually the ai is supposed to 295 00:11:14,790 --> 00:11:12,399 replace the random number generator once 296 00:11:17,590 --> 00:11:14,800 it has trained enough on enough many 297 00:11:20,790 --> 00:11:18,389 and 298 00:11:23,430 --> 00:11:20,800 in order to do the projects even more 299 00:11:25,590 --> 00:11:23,440 interesting we are collaborating with 300 00:11:27,350 --> 00:11:25,600 several schools in institutes and 301 00:11:30,230 --> 00:11:27,360 amateur associations 302 00:11:32,230 --> 00:11:30,240 um with in african countries in 303 00:11:33,509 --> 00:11:32,240 particular in nigeria cameroon and 304 00:11:35,509 --> 00:11:33,519 algeria 305 00:11:37,590 --> 00:11:35,519 and we hope to implement the vasco 306 00:11:39,350 --> 00:11:37,600 project as a part of the education there 307 00:11:41,910 --> 00:11:39,360 so that we know that even if we don't 308 00:11:42,949 --> 00:11:41,920 find et we hope that we can inspire many 309 00:11:45,670 --> 00:11:42,959 of these 310 00:11:49,190 --> 00:11:45,680 young african astronomers astronomers 311 00:11:53,590 --> 00:11:52,310 so that's a side thing we do 312 00:11:56,790 --> 00:11:53,600 so far 313 00:11:58,870 --> 00:11:56,800 out of the 150 000 objects we have 114 314 00:12:00,790 --> 00:11:58,880 000 classifications 315 00:12:02,470 --> 00:12:00,800 and you can see here a timeline when it 316 00:12:05,350 --> 00:12:02,480 started when the project started last 317 00:12:07,509 --> 00:12:05,360 year it started very slowly then things 318 00:12:09,430 --> 00:12:07,519 started being a little bit more visible 319 00:12:11,269 --> 00:12:09,440 then i gave a talk at the seti institute 320 00:12:13,590 --> 00:12:11,279 and you see a big peak here 321 00:12:17,350 --> 00:12:13,600 well it 322 00:12:19,670 --> 00:12:17,360 right now we have 1 800 candidates 323 00:12:22,949 --> 00:12:19,680 roughly that are marked as vanished that 324 00:12:24,710 --> 00:12:22,959 we have to look through and double check 325 00:12:26,790 --> 00:12:24,720 so that's the status of our citizen 326 00:12:29,190 --> 00:12:26,800 science project we actually also have 327 00:12:30,230 --> 00:12:29,200 automatized searches and by the end of 328 00:12:33,030 --> 00:12:30,240 september 329 00:12:35,430 --> 00:12:33,040 we will have a automatized answer to 330 00:12:37,190 --> 00:12:35,440 whether there are any vanishing stars 331 00:12:38,949 --> 00:12:37,200 so it's all happening right now all the 332 00:12:41,910 --> 00:12:38,959 results are coming in in the last months 333 00:12:43,110 --> 00:12:41,920 and it's very exciting 334 00:12:43,990 --> 00:12:43,120 so 335 00:12:51,350 --> 00:12:44,000 we 336 00:12:53,190 --> 00:12:51,360 and that is actually what i mainly would 337 00:12:54,069 --> 00:12:53,200 like to tell you about 338 00:12:55,829 --> 00:12:54,079 so 339 00:12:57,590 --> 00:12:55,839 this is a paper that was published two 340 00:13:00,310 --> 00:12:57,600 months ago 341 00:13:01,590 --> 00:13:00,320 in nature's scientific reports 342 00:13:03,040 --> 00:13:01,600 and 343 00:13:04,389 --> 00:13:03,050 the paper got 344 00:13:06,870 --> 00:13:04,399 [Music] 345 00:13:08,790 --> 00:13:06,880 a lot of both 346 00:13:11,190 --> 00:13:08,800 unusual attention we can say it like 347 00:13:12,150 --> 00:13:11,200 that due to several factors 348 00:13:13,910 --> 00:13:12,160 and 349 00:13:16,069 --> 00:13:13,920 there were some cancelling on social 350 00:13:18,069 --> 00:13:16,079 media and there were some 351 00:13:21,110 --> 00:13:18,079 very excited astronomers it really 352 00:13:23,190 --> 00:13:21,120 lifted all kind of emotions 353 00:13:24,790 --> 00:13:23,200 and 354 00:13:28,069 --> 00:13:24,800 it's called exploring nine 355 00:13:30,069 --> 00:13:28,079 simultaneously occurring transients 356 00:13:31,350 --> 00:13:30,079 i'm going to show you an image 357 00:13:32,829 --> 00:13:31,360 you see here 358 00:13:35,990 --> 00:13:32,839 and 359 00:13:38,710 --> 00:13:36,000 nine well it's basically 360 00:13:40,949 --> 00:13:38,720 nine objects 361 00:13:42,550 --> 00:13:40,959 it looks like normal stars let me show a 362 00:13:44,150 --> 00:13:42,560 little bit clearer 363 00:13:46,230 --> 00:13:44,160 uh like if you look at the light 364 00:13:49,189 --> 00:13:46,240 profiles of these objects the black one 365 00:13:51,189 --> 00:13:49,199 is of a typical normal star how the 366 00:13:52,550 --> 00:13:51,199 brightness falls off 367 00:13:55,590 --> 00:13:52,560 as a measure of the distance from the 368 00:13:58,230 --> 00:13:55,600 center and all these objects just look 369 00:13:59,990 --> 00:13:58,240 like normal stars 370 00:14:02,310 --> 00:14:00,000 now if you have 371 00:14:03,430 --> 00:14:02,320 a very like careful look you're going to 372 00:14:06,389 --> 00:14:03,440 discover 373 00:14:13,350 --> 00:14:08,310 that there's a tiny problem 374 00:14:17,509 --> 00:14:15,269 they were there in 1950 they are no 375 00:14:19,910 --> 00:14:17,519 longer there in 1996 and this is a small 376 00:14:21,670 --> 00:14:19,920 region of the sky 377 00:14:24,150 --> 00:14:21,680 i actually unfortunately included some 378 00:14:26,069 --> 00:14:24,160 digita this is actually i haven't marked 379 00:14:27,829 --> 00:14:26,079 it here but this is not a real star 380 00:14:30,310 --> 00:14:27,839 unfortunately and neither are those 381 00:14:31,990 --> 00:14:30,320 these are digital uh scanning artifacts 382 00:14:33,509 --> 00:14:32,000 i forgot to mark them 383 00:14:36,069 --> 00:14:33,519 sorry for that 384 00:14:40,470 --> 00:14:36,079 anyway nine of these objects are there 385 00:14:43,110 --> 00:14:40,480 in 1950 but not in 1996. 386 00:14:45,110 --> 00:14:43,120 and if you start comparing you see that 387 00:14:47,189 --> 00:14:45,120 six days later these nine objects 388 00:14:49,110 --> 00:14:47,199 weren't there and you if you look at it 389 00:14:50,069 --> 00:14:49,120 half an hour earlier they also weren't 390 00:14:53,110 --> 00:14:50,079 there 391 00:14:54,069 --> 00:14:53,120 which is really really weird 392 00:14:55,110 --> 00:14:54,079 so 393 00:14:58,230 --> 00:14:55,120 we first 394 00:14:59,910 --> 00:14:58,240 as a first intuitive exploration we use 395 00:15:02,790 --> 00:14:59,920 the grand telescopic canaries which is a 396 00:15:04,550 --> 00:15:02,800 10.4 meter telescope trying to see okay 397 00:15:05,990 --> 00:15:04,560 if there were stars there 398 00:15:08,069 --> 00:15:06,000 have they possibly vanished is there 399 00:15:10,870 --> 00:15:08,079 something at the spot 400 00:15:12,550 --> 00:15:10,880 and we got really deep images 401 00:15:14,629 --> 00:15:12,560 for some things we found something on 402 00:15:16,629 --> 00:15:14,639 the place for others not 403 00:15:19,030 --> 00:15:16,639 and we kind of looked at this to this 404 00:15:21,509 --> 00:15:19,040 gtc you see here there are much higher 405 00:15:23,509 --> 00:15:21,519 resolution images that are modern 406 00:15:24,949 --> 00:15:23,519 70 years later 407 00:15:27,990 --> 00:15:24,959 and 408 00:15:29,350 --> 00:15:28,000 we kind of concluded that 409 00:15:30,790 --> 00:15:29,360 maybe 410 00:15:32,550 --> 00:15:30,800 those that had some kind of counter 411 00:15:34,710 --> 00:15:32,560 posture were just chance projections it 412 00:15:36,550 --> 00:15:34,720 could be that it was just if you if you 413 00:15:38,310 --> 00:15:36,560 have a really 414 00:15:40,310 --> 00:15:38,320 high resolution images you will always 415 00:15:42,069 --> 00:15:40,320 find some type of some background stars 416 00:15:43,430 --> 00:15:42,079 it doesn't mean that they are physically 417 00:15:45,350 --> 00:15:43,440 connected 418 00:15:49,350 --> 00:15:45,360 so we suddenly have a problem what are 419 00:15:52,550 --> 00:15:50,310 and 420 00:15:54,550 --> 00:15:52,560 we have taken a look at astrophysical 421 00:15:57,189 --> 00:15:54,560 reasons and there's absolutely not a 422 00:16:00,069 --> 00:15:57,199 single astrophy physical explanation to 423 00:16:01,749 --> 00:16:00,079 having so many of transients that happen 424 00:16:04,230 --> 00:16:01,759 in a small region of the sky at the same 425 00:16:06,310 --> 00:16:04,240 time there's just no way 426 00:16:09,430 --> 00:16:06,320 pure astrophysically because the density 427 00:16:11,269 --> 00:16:09,440 is too high 428 00:16:12,790 --> 00:16:11,279 and so we started looking at different 429 00:16:14,949 --> 00:16:12,800 instrumental issues we were thinking 430 00:16:17,189 --> 00:16:14,959 could it be that the images have a 431 00:16:18,790 --> 00:16:17,199 different spectral sensitivity but no 432 00:16:21,110 --> 00:16:18,800 because we actually had 433 00:16:22,790 --> 00:16:21,120 we could compare it with the image taken 434 00:16:24,710 --> 00:16:22,800 with the same instrumentation 16 minutes 435 00:16:27,670 --> 00:16:24,720 later we're wondering it could be some 436 00:16:30,150 --> 00:16:27,680 type of ghost image no because the 437 00:16:31,829 --> 00:16:30,160 stars had just two perfects and 438 00:16:33,749 --> 00:16:31,839 brightness profiles 439 00:16:35,590 --> 00:16:33,759 could it be a double exposure we did a 440 00:16:37,269 --> 00:16:35,600 few tests and it seems we cannot exclude 441 00:16:38,470 --> 00:16:37,279 it but it seems quite unlikely or very 442 00:16:40,470 --> 00:16:38,480 unlikely 443 00:16:42,949 --> 00:16:40,480 emotion problems again we have the 444 00:16:44,629 --> 00:16:42,959 problem of that all these objects have 445 00:16:47,269 --> 00:16:44,639 very star-like 446 00:16:49,430 --> 00:16:47,279 um profiles now again it should be nine 447 00:16:51,269 --> 00:16:49,440 star-like defects not twelve because we 448 00:16:53,350 --> 00:16:51,279 found out later that's three out of 12 449 00:16:55,749 --> 00:16:53,360 were scanning artifacts 450 00:16:57,670 --> 00:16:55,759 cosmic rays they are not a problem for 451 00:17:01,269 --> 00:16:57,680 photographic plates in the same way as 452 00:17:02,069 --> 00:17:01,279 they are for modern ccds 453 00:17:06,630 --> 00:17:02,079 so 454 00:17:08,470 --> 00:17:06,640 another like 455 00:17:11,110 --> 00:17:08,480 and so then we started getting more 456 00:17:14,710 --> 00:17:11,120 desperate our referee asked could it be 457 00:17:17,029 --> 00:17:14,720 that someone sneezed on the plates 458 00:17:20,390 --> 00:17:17,039 so then we had i had to open some kobe 459 00:17:22,710 --> 00:17:20,400 19 articles look at the 460 00:17:25,829 --> 00:17:22,720 other profiles of um 461 00:17:28,309 --> 00:17:25,839 of water and saliva and you see that 462 00:17:30,070 --> 00:17:28,319 saliva does not give perfect round 463 00:17:32,310 --> 00:17:30,080 shapes as you can see here they give 464 00:17:34,789 --> 00:17:32,320 elongated forms and all kinds of things 465 00:17:37,110 --> 00:17:34,799 different distributions of sizes no 466 00:17:39,029 --> 00:17:37,120 nobody sneeze on the blades 467 00:17:39,909 --> 00:17:39,039 so we now call it 468 00:17:42,310 --> 00:17:39,919 um 469 00:17:44,390 --> 00:17:42,320 unknown condemnation 470 00:17:46,470 --> 00:17:44,400 one hypothesis that we had is that it 471 00:17:48,470 --> 00:17:46,480 could be nuclear fallout 472 00:17:50,789 --> 00:17:48,480 because nuclear fallout can give 473 00:17:52,390 --> 00:17:50,799 actually these beautiful round spots on 474 00:17:54,950 --> 00:17:52,400 x-ray film 475 00:17:57,190 --> 00:17:54,960 now i don't know if the red emotions 476 00:17:58,789 --> 00:17:57,200 from the 1950s were sensitive to the 477 00:18:00,789 --> 00:17:58,799 x-ray film 478 00:18:04,150 --> 00:18:00,799 there's just one problem 479 00:18:07,510 --> 00:18:04,160 um in the place where the the pal at the 480 00:18:09,669 --> 00:18:07,520 in the region um um it's called near the 481 00:18:12,310 --> 00:18:09,679 palomar observatory there were no 482 00:18:14,789 --> 00:18:12,320 nuclear bomb tests actually after in 483 00:18:16,950 --> 00:18:14,799 general in u.s one didn't do any nuclear 484 00:18:18,870 --> 00:18:16,960 bomb tests in that year 485 00:18:20,549 --> 00:18:18,880 and 199 486 00:18:23,669 --> 00:18:20,559 there were no official bomb tests 487 00:18:25,029 --> 00:18:23,679 between 1949 to 1951 488 00:18:26,830 --> 00:18:25,039 and 489 00:18:29,750 --> 00:18:26,840 so one can of course question whether 490 00:18:31,430 --> 00:18:29,760 the yeah well the official lists are 491 00:18:33,350 --> 00:18:31,440 complete or not 492 00:18:35,510 --> 00:18:33,360 and the second problem is of course also 493 00:18:36,470 --> 00:18:35,520 that we are seeing more of these events 494 00:18:38,549 --> 00:18:36,480 in a 495 00:18:40,070 --> 00:18:38,559 confined region of the photographic 496 00:18:41,669 --> 00:18:40,080 plates 497 00:18:43,110 --> 00:18:41,679 while maybe this contamination from 498 00:18:44,470 --> 00:18:43,120 nuclear pumps would have been all over 499 00:18:46,230 --> 00:18:44,480 the place 500 00:18:47,590 --> 00:18:46,240 so 501 00:18:50,070 --> 00:18:47,600 i don't know 502 00:18:52,630 --> 00:18:50,080 we call it that it might be some type 503 00:18:53,990 --> 00:18:52,640 unknown type of contamination 504 00:18:56,070 --> 00:18:54,000 however 505 00:18:57,990 --> 00:18:56,080 we also started thinking of a different 506 00:18:59,510 --> 00:18:58,000 possibility 507 00:19:01,669 --> 00:18:59,520 if you would use exactly the same 508 00:19:03,110 --> 00:19:01,679 instrumentation today 509 00:19:06,310 --> 00:19:03,120 and uh 510 00:19:07,510 --> 00:19:06,320 like same instrumentation and look uh at 511 00:19:09,350 --> 00:19:07,520 the sky 512 00:19:11,029 --> 00:19:09,360 you actually could find this type of 513 00:19:12,789 --> 00:19:11,039 multiple transitions 514 00:19:14,070 --> 00:19:12,799 in a small region you would find it 515 00:19:15,830 --> 00:19:14,080 quite often 516 00:19:19,430 --> 00:19:15,840 and why is it so well because today we 517 00:19:20,950 --> 00:19:19,440 had we have a lot of satellites a lot of 518 00:19:22,870 --> 00:19:20,960 space debris 519 00:19:25,270 --> 00:19:22,880 in fact most of the times when you think 520 00:19:27,830 --> 00:19:25,280 that you observe a very fast flash from 521 00:19:29,750 --> 00:19:27,840 the sky it's just a solar reflection of 522 00:19:32,310 --> 00:19:29,760 a satellite or debris 523 00:19:34,310 --> 00:19:32,320 and that comes from small it can be a 524 00:19:36,310 --> 00:19:34,320 small object even just 525 00:19:39,190 --> 00:19:36,320 centimeters or tens of centimeters in 526 00:19:41,909 --> 00:19:39,200 size and that create this very fast 527 00:19:43,750 --> 00:19:41,919 transient like events 528 00:19:46,549 --> 00:19:43,760 however 529 00:19:49,350 --> 00:19:46,559 um no glint should be observed before 530 00:19:51,669 --> 00:19:49,360 1963 when the first 531 00:19:54,070 --> 00:19:51,679 satellite was launched high enough to 532 00:19:57,029 --> 00:19:54,080 reach us geosynchronous orbits 533 00:19:59,270 --> 00:19:57,039 also the first satellite was in 1957 534 00:20:00,710 --> 00:19:59,280 so theoretically we shouldn't be able to 535 00:20:01,909 --> 00:20:00,720 observe this kind of 536 00:20:04,710 --> 00:20:01,919 events 537 00:20:06,789 --> 00:20:04,720 because our image is from 1950 538 00:20:08,549 --> 00:20:06,799 we still ask the question 539 00:20:10,950 --> 00:20:08,559 and uh which 540 00:20:12,549 --> 00:20:10,960 leads us to the kind of conclusion that 541 00:20:14,149 --> 00:20:12,559 we're either dealing with some type of 542 00:20:15,830 --> 00:20:14,159 unknown contamination that we couldn't 543 00:20:17,750 --> 00:20:15,840 at all pinpoint 544 00:20:20,390 --> 00:20:17,760 or possibly we are 545 00:20:22,789 --> 00:20:20,400 observing something that could 546 00:20:25,990 --> 00:20:22,799 indicate that some type of artificial 547 00:20:27,750 --> 00:20:26,000 objects in high orbit already in 1950 548 00:20:29,750 --> 00:20:27,760 in order to test the latter scenario 549 00:20:31,270 --> 00:20:29,760 we're going to look for 550 00:20:32,230 --> 00:20:31,280 this type of image is something that 551 00:20:35,510 --> 00:20:32,240 would be 552 00:20:37,590 --> 00:20:35,520 a much clearer signature of metal or 553 00:20:40,149 --> 00:20:37,600 glass or something reflective 554 00:20:42,789 --> 00:20:40,159 in these images in 1950 555 00:20:45,430 --> 00:20:42,799 and we are doing these touches right now 556 00:20:47,190 --> 00:20:45,440 i estimate that we will be we will have 557 00:20:49,430 --> 00:20:47,200 our answer within a few months since we 558 00:20:51,190 --> 00:20:49,440 already have all these citizen science 559 00:20:53,590 --> 00:20:51,200 results and all the results from the 560 00:20:55,909 --> 00:20:53,600 automatized sky scan 561 00:20:57,909 --> 00:20:55,919 since all of this is already 562 00:20:59,990 --> 00:20:57,919 well in progress to be finished it will 563 00:21:02,789 --> 00:21:00,000 just take a few months extra to search 564 00:21:04,950 --> 00:21:02,799 for this very clear signatures of metal 565 00:21:06,149 --> 00:21:04,960 in high orbits 566 00:21:08,870 --> 00:21:06,159 and 567 00:21:11,750 --> 00:21:08,880 with this i think i'm finishing the talk 568 00:21:13,990 --> 00:21:11,760 i have shown you our latest results from 569 00:21:17,590 --> 00:21:14,000 the vasco projects and 570 00:21:23,110 --> 00:21:17,600 our ongoing mystery and with the nine 571 00:21:27,270 --> 00:21:25,110 and for people who are 572 00:21:31,029 --> 00:21:27,280 excited about what astronomers can you 573 00:21:33,590 --> 00:21:31,039 do with ufos i have also recently joined 574 00:21:35,430 --> 00:21:33,600 abbey leups galileo projects 575 00:21:37,190 --> 00:21:35,440 that some of you might have heard about 576 00:21:38,310 --> 00:21:37,200 where they are planning to do a data 577 00:21:39,190 --> 00:21:38,320 driven 578 00:21:41,510 --> 00:21:39,200 uh 579 00:21:44,870 --> 00:21:41,520 and observational approach to searching 580 00:21:47,430 --> 00:21:44,880 for uaps and ufos