1 00:00:11,749 --> 00:00:09,669 constellations 2 00:00:14,150 --> 00:00:11,759 deep sky objects 3 00:00:17,510 --> 00:00:14,160 planets and events 4 00:00:37,830 --> 00:00:17,520 tonight's sky highlights of the february 5 00:00:41,990 --> 00:00:40,310 after the sun sets on these cold 6 00:00:44,470 --> 00:00:42,000 february days 7 00:00:48,630 --> 00:00:44,480 look for two bright stars 8 00:00:53,270 --> 00:00:48,640 blazing above the western horizon 9 00:01:11,109 --> 00:00:53,280 these aren't stars at all but planets 10 00:01:11,119 --> 00:01:20,789 jupiter appears higher up 11 00:01:20,799 --> 00:01:31,190 use a telescope to get a better view 12 00:01:36,710 --> 00:01:33,830 mars appears in the east late in the 13 00:01:39,030 --> 00:01:36,720 evening and climbs higher during the 14 00:01:41,990 --> 00:01:39,040 morning hours 15 00:02:03,830 --> 00:01:42,000 a telescope will help uncover some of 16 00:02:09,589 --> 00:02:06,630 the winter night sky filled with 17 00:02:18,869 --> 00:02:09,599 brilliant stars presents one of the best 18 00:02:22,550 --> 00:02:21,350 orion the great hunter of greek 19 00:02:28,070 --> 00:02:22,560 mythology 20 00:02:32,309 --> 00:02:30,710 this constellation is among the easiest 21 00:02:34,869 --> 00:02:32,319 to recognize 22 00:02:36,470 --> 00:02:34,879 it is full of young stars 23 00:02:38,710 --> 00:02:36,480 dying stars 24 00:02:42,070 --> 00:02:38,720 and many nebulae 25 00:02:45,390 --> 00:02:42,080 beetlejuice one of orion's shoulders is 26 00:02:49,190 --> 00:02:45,400 a red supergiant star about 27 00:02:52,150 --> 00:02:49,200 650 times bigger than the sun 28 00:02:55,190 --> 00:02:52,160 it shines with the brightness of tens of 29 00:02:58,390 --> 00:02:55,200 thousands of suns 30 00:03:00,710 --> 00:02:58,400 beetlejuice is near the end of its life 31 00:03:03,110 --> 00:03:00,720 with the fuel at the star's core 32 00:03:05,589 --> 00:03:03,120 practically depleted the core has 33 00:03:07,910 --> 00:03:05,599 contracted and heated 34 00:03:12,630 --> 00:03:07,920 causing the outer gaseous layers of the 35 00:03:20,550 --> 00:03:16,550 rigel one of orion's knees is a triple 36 00:03:23,589 --> 00:03:20,560 star system made up of two smaller stars 37 00:03:26,949 --> 00:03:23,599 orbiting a blue supergiant 38 00:03:28,390 --> 00:03:26,959 rigel's blue supergiant star has a short 39 00:03:31,350 --> 00:03:28,400 lifespan 40 00:03:32,789 --> 00:03:31,360 blue supergiant stars are much hotter 41 00:03:36,789 --> 00:03:32,799 than our sun 42 00:03:43,110 --> 00:03:40,149 orion's belt is easy to spot 43 00:03:44,710 --> 00:03:43,120 it is made up of three stars 44 00:03:48,630 --> 00:03:44,720 ulnatak 45 00:03:54,949 --> 00:03:51,589 from the left side of orion's belt look 46 00:03:57,830 --> 00:03:54,959 down to the great orion nebula 47 00:04:00,550 --> 00:03:57,840 although barely visible to the naked eye 48 00:04:02,229 --> 00:04:00,560 it is the brightest diffuse gas cloud in 49 00:04:05,509 --> 00:04:02,239 the night sky 50 00:04:08,630 --> 00:04:05,519 nebula is latin for cloud 51 00:04:18,629 --> 00:04:08,640 a small telescope unveils the details 52 00:04:23,270 --> 00:04:21,830 embedded inside the orion nebula is the 53 00:04:27,030 --> 00:04:23,280 trapezium 54 00:04:45,110 --> 00:04:27,040 a group of hot young stars so brilliant 55 00:04:50,390 --> 00:04:48,150 canis major the great dog is the 56 00:04:55,110 --> 00:04:50,400 faithful companion who follows in 57 00:05:00,469 --> 00:04:57,749 canis major is dominated by the most 58 00:05:01,990 --> 00:05:00,479 brilliant star in the night sky 59 00:05:08,390 --> 00:05:02,000 sirius 60 00:05:11,110 --> 00:05:08,400 containing a bright star and a much 61 00:05:15,270 --> 00:05:11,120 smaller and fainter companion 62 00:05:17,670 --> 00:05:15,280 it is a mere 8.6 light years away 63 00:05:20,550 --> 00:05:17,680 scanning with binoculars just below 64 00:05:23,350 --> 00:05:20,560 sirius will reveal a lovely cluster of 65 00:05:27,110 --> 00:05:23,360 stars called m41 66 00:05:29,350 --> 00:05:27,120 it contains about 100 stars including 67 00:05:32,790 --> 00:05:29,360 several red giants 68 00:05:52,790 --> 00:05:32,800 stars in clusters like m41 were born 69 00:05:58,070 --> 00:05:55,749 saturn rises in the east around midnight 70 00:06:06,950 --> 00:05:58,080 and climbs higher throughout the morning 71 00:06:16,390 --> 00:06:09,990 use a telescope to spy its marvelous 72 00:06:21,270 --> 00:06:19,990 the night sky is always a celestial 73 00:06:23,830 --> 00:06:21,280 showcase