1 00:00:00,000 --> 00:00:32,460 I 2 00:00:32,460 --> 00:00:32,470 3 00:00:32,470 --> 00:00:34,800 sometimes an astronomy it's not what you 4 00:00:34,800 --> 00:00:34,810 sometimes an astronomy it's not what you 5 00:00:34,810 --> 00:00:36,960 sometimes an astronomy it's not what you see but what you don't see that says the 6 00:00:36,960 --> 00:00:36,970 see but what you don't see that says the 7 00:00:36,970 --> 00:00:39,990 see but what you don't see that says the most that may be the case with 47 to 8 00:00:39,990 --> 00:00:40,000 most that may be the case with 47 to 9 00:00:40,000 --> 00:00:42,360 most that may be the case with 47 to Canaan a densely packed star cluster in 10 00:00:42,360 --> 00:00:42,370 Canaan a densely packed star cluster in 11 00:00:42,370 --> 00:00:44,970 Canaan a densely packed star cluster in the southern hemisphere astronomer Ron 12 00:00:44,970 --> 00:00:44,980 the southern hemisphere astronomer Ron 13 00:00:44,980 --> 00:00:47,610 the southern hemisphere astronomer Ron gilliland surveyed 47 tuck looking for a 14 00:00:47,610 --> 00:00:47,620 gilliland surveyed 47 tuck looking for a 15 00:00:47,620 --> 00:00:50,160 gilliland surveyed 47 tuck looking for a certain class of planets so-called hot 16 00:00:50,160 --> 00:00:50,170 certain class of planets so-called hot 17 00:00:50,170 --> 00:00:51,990 certain class of planets so-called hot Jupiters because they're roughly the 18 00:00:51,990 --> 00:00:52,000 Jupiters because they're roughly the 19 00:00:52,000 --> 00:00:53,820 Jupiters because they're roughly the same size as Jupiter but live in very 20 00:00:53,820 --> 00:00:53,830 same size as Jupiter but live in very 21 00:00:53,830 --> 00:00:56,160 same size as Jupiter but live in very tight orbits around their stars and are 22 00:00:56,160 --> 00:00:56,170 tight orbits around their stars and are 23 00:00:56,170 --> 00:00:58,830 tight orbits around their stars and are common in our part of the galaxy the 24 00:00:58,830 --> 00:00:58,840 common in our part of the galaxy the 25 00:00:58,840 --> 00:01:00,300 common in our part of the galaxy the eight-day Hubble survey turned up a 26 00:01:00,300 --> 00:01:00,310 eight-day Hubble survey turned up a 27 00:01:00,310 --> 00:01:03,090 eight-day Hubble survey turned up a surprise and 35,000 star surveyed no 28 00:01:03,090 --> 00:01:03,100 surprise and 35,000 star surveyed no 29 00:01:03,100 --> 00:01:06,630 surprise and 35,000 star surveyed no planets none Gilliland's team fine-tuned 30 00:01:06,630 --> 00:01:06,640 planets none Gilliland's team fine-tuned 31 00:01:06,640 --> 00:01:08,370 planets none Gilliland's team fine-tuned Hubble so that it could see the slide 32 00:01:08,370 --> 00:01:08,380 Hubble so that it could see the slide 33 00:01:08,380 --> 00:01:10,020 Hubble so that it could see the slide dimming of stars that happens when a 34 00:01:10,020 --> 00:01:10,030 dimming of stars that happens when a 35 00:01:10,030 --> 00:01:12,090 dimming of stars that happens when a jupiter-sized planet passes between them 36 00:01:12,090 --> 00:01:12,100 jupiter-sized planet passes between them 37 00:01:12,100 --> 00:01:13,980 jupiter-sized planet passes between them and the earth in fact the search 38 00:01:13,980 --> 00:01:13,990 and the earth in fact the search 39 00:01:13,990 --> 00:01:16,080 and the earth in fact the search technique was so sensitive that Hubble 40 00:01:16,080 --> 00:01:16,090 technique was so sensitive that Hubble 41 00:01:16,090 --> 00:01:17,850 technique was so sensitive that Hubble did pick up the variations in several 42 00:01:17,850 --> 00:01:17,860 did pick up the variations in several 43 00:01:17,860 --> 00:01:20,570 did pick up the variations in several binary star pairs but still no planets 44 00:01:20,570 --> 00:01:20,580 binary star pairs but still no planets 45 00:01:20,580 --> 00:01:22,890 binary star pairs but still no planets 47 Chuck is very different from our 46 00:01:22,890 --> 00:01:22,900 47 Chuck is very different from our 47 00:01:22,900 --> 00:01:25,170 47 Chuck is very different from our local neighborhood stars are much closer 48 00:01:25,170 --> 00:01:25,180 local neighborhood stars are much closer 49 00:01:25,180 --> 00:01:27,330 local neighborhood stars are much closer together and they lack the heavy metals 50 00:01:27,330 --> 00:01:27,340 together and they lack the heavy metals 51 00:01:27,340 --> 00:01:29,790 together and they lack the heavy metals common in our area this result doesn't 52 00:01:29,790 --> 00:01:29,800 common in our area this result doesn't 53 00:01:29,800 --> 00:01:31,260 common in our area this result doesn't rule out the presence of other planets 54 00:01:31,260 --> 00:01:31,270 rule out the presence of other planets 55 00:01:31,270 --> 00:01:33,570 rule out the presence of other planets but the zero score may have a lot to say 56 00:01:33,570 --> 00:01:33,580 but the zero score may have a lot to say 57 00:01:33,580 --> 00:01:35,490 but the zero score may have a lot to say about some of astronomy's biggest 58 00:01:35,490 --> 00:01:35,500 about some of astronomy's biggest 59 00:01:35,500 --> 00:01:38,760 about some of astronomy's biggest questions I think that's telling us that 60 00:01:38,760 --> 00:01:38,770 questions I think that's telling us that 61 00:01:38,770 --> 00:01:42,990 questions I think that's telling us that it's probably the case that stars born 62 00:01:42,990 --> 00:01:43,000 it's probably the case that stars born 63 00:01:43,000 --> 00:01:46,560 it's probably the case that stars born into this environment very crowded low 64 00:01:46,560 --> 00:01:46,570 into this environment very crowded low 65 00:01:46,570 --> 00:01:49,260 into this environment very crowded low metallicity are not likely not as likely 66 00:01:49,260 --> 00:01:49,270 metallicity are not likely not as likely 67 00:01:49,270 --> 00:01:52,469 metallicity are not likely not as likely to have planets as those in the local 68 00:01:52,469 --> 00:01:52,479 to have planets as those in the local 69 00:01:52,479 --> 00:01:54,780 to have planets as those in the local environment astronomers need more data 70 00:01:54,780 --> 00:01:54,790 environment astronomers need more data 71 00:01:54,790 --> 00:01:57,210 environment astronomers need more data from 47 to County to determine whether 72 00:01:57,210 --> 00:01:57,220 from 47 to County to determine whether 73 00:01:57,220 --> 00:01:59,399 from 47 to County to determine whether the clusters lack of metals or its tidal 74 00:01:59,399 --> 00:01:59,409 the clusters lack of metals or its tidal 75 00:01:59,409 --> 00:02:02,190 the clusters lack of metals or its tidal forces or some other unknown force keeps 76 00:02:02,190 --> 00:02:02,200 forces or some other unknown force keeps 77 00:02:02,200 --> 00:04:45,119 forces or some other unknown force keeps the hot Jupiters from forming 78 00:04:45,119 --> 00:04:45,129 79 00:04:45,129 --> 00:04:48,269 I think that's telling us that it's 80 00:04:48,269 --> 00:04:48,279 I think that's telling us that it's 81 00:04:48,279 --> 00:04:52,919 I think that's telling us that it's probably the case that stars born into 82 00:04:52,919 --> 00:04:52,929 probably the case that stars born into 83 00:04:52,929 --> 00:04:55,859 probably the case that stars born into this environment very crowded low 84 00:04:55,859 --> 00:04:55,869 this environment very crowded low 85 00:04:55,869 --> 00:04:58,559 this environment very crowded low metallicity are not likely not as likely 86 00:04:58,559 --> 00:04:58,569 metallicity are not likely not as likely 87 00:04:58,569 --> 00:05:01,769 metallicity are not likely not as likely to have planets as those in the local 88 00:05:01,769 --> 00:05:01,779 to have planets as those in the local 89 00:05:01,779 --> 00:07:18,610 to have planets as those in the local environment 90 00:07:18,610 --> 00:07:18,620 91 00:07:18,620 --> 00:07:20,680 you