1 00:00:01,100 --> 00:00:04,340 covering the week's top textbooks like 2 00:00:04,340 --> 00:00:04,350 covering the week's top textbooks like 3 00:00:04,350 --> 00:00:06,950 covering the week's top textbooks like Linux bias astronomers have stumbled 4 00:00:06,950 --> 00:00:06,960 Linux bias astronomers have stumbled 5 00:00:06,960 --> 00:00:09,200 Linux bias astronomers have stumbled across the nearest black hole to us yet 6 00:00:09,200 --> 00:00:09,210 across the nearest black hole to us yet 7 00:00:09,210 --> 00:00:11,299 across the nearest black hole to us yet the void lies at the heart of a stellar 8 00:00:11,299 --> 00:00:11,309 the void lies at the heart of a stellar 9 00:00:11,309 --> 00:00:13,160 the void lies at the heart of a stellar system just a thousand light-years away 10 00:00:13,160 --> 00:00:13,170 system just a thousand light-years away 11 00:00:13,170 --> 00:00:15,320 system just a thousand light-years away and indications to his location are 12 00:00:15,320 --> 00:00:15,330 and indications to his location are 13 00:00:15,330 --> 00:00:17,900 and indications to his location are visible to the naked eye a team of 14 00:00:17,900 --> 00:00:17,910 visible to the naked eye a team of 15 00:00:17,910 --> 00:00:20,480 visible to the naked eye a team of researchers were observing the hr6 8 1 9 16 00:00:20,480 --> 00:00:20,490 researchers were observing the hr6 8 1 9 17 00:00:20,490 --> 00:00:22,790 researchers were observing the hr6 8 1 9 star system from the European Southern 18 00:00:22,790 --> 00:00:22,800 star system from the European Southern 19 00:00:22,800 --> 00:00:25,460 star system from the European Southern Observatory in Chile as part of a wider 20 00:00:25,460 --> 00:00:25,470 Observatory in Chile as part of a wider 21 00:00:25,470 --> 00:00:28,849 Observatory in Chile as part of a wider survey studying by our start binary star 22 00:00:28,849 --> 00:00:28,859 survey studying by our start binary star 23 00:00:28,859 --> 00:00:31,609 survey studying by our start binary star systems and they stumbled across a third 24 00:00:31,609 --> 00:00:31,619 systems and they stumbled across a third 25 00:00:31,619 --> 00:00:34,310 systems and they stumbled across a third object spectral graphic data revealed 26 00:00:34,310 --> 00:00:34,320 object spectral graphic data revealed 27 00:00:34,320 --> 00:00:35,870 object spectral graphic data revealed that one of the stars orbited an 28 00:00:35,870 --> 00:00:35,880 that one of the stars orbited an 29 00:00:35,880 --> 00:00:38,290 that one of the stars orbited an invisible companion every 40 days 30 00:00:38,290 --> 00:00:38,300 invisible companion every 40 days 31 00:00:38,300 --> 00:00:40,700 invisible companion every 40 days meanwhile the second star sits much 32 00:00:40,700 --> 00:00:40,710 meanwhile the second star sits much 33 00:00:40,710 --> 00:00:43,250 meanwhile the second star sits much farther away from the first they now 34 00:00:43,250 --> 00:00:43,260 farther away from the first they now 35 00:00:43,260 --> 00:00:46,160 farther away from the first they now believe that the HR 68 19 is not a 36 00:00:46,160 --> 00:00:46,170 believe that the HR 68 19 is not a 37 00:00:46,170 --> 00:00:48,799 believe that the HR 68 19 is not a double system but a triple system one 38 00:00:48,799 --> 00:00:48,809 double system but a triple system one 39 00:00:48,809 --> 00:00:50,330 double system but a triple system one that contains two stars that are both 40 00:00:50,330 --> 00:00:50,340 that contains two stars that are both 41 00:00:50,340 --> 00:00:52,670 that contains two stars that are both around the 6 solar masses and a third 42 00:00:52,670 --> 00:00:52,680 around the 6 solar masses and a third 43 00:00:52,680 --> 00:00:55,250 around the 6 solar masses and a third object that is at least 4.2 solar masses 44 00:00:55,250 --> 00:00:55,260 object that is at least 4.2 solar masses 45 00:00:55,260 --> 00:00:57,439 object that is at least 4.2 solar masses that number is much too high for the 46 00:00:57,439 --> 00:00:57,449 that number is much too high for the 47 00:00:57,449 --> 00:00:59,619 that number is much too high for the object to be a neutron star 48 00:00:59,619 --> 00:00:59,629 object to be a neutron star 49 00:00:59,629 --> 00:01:02,270 object to be a neutron star Thomas Ravinia spher star of the study 50 00:01:02,270 --> 00:01:02,280 Thomas Ravinia spher star of the study 51 00:01:02,280 --> 00:01:04,729 Thomas Ravinia spher star of the study said an invisible object with a mass at 52 00:01:04,729 --> 00:01:04,739 said an invisible object with a mass at 53 00:01:04,739 --> 00:01:06,679 said an invisible object with a mass at least four times out of the Sun can only 54 00:01:06,679 --> 00:01:06,689 least four times out of the Sun can only 55 00:01:06,689 --> 00:01:09,500 least four times out of the Sun can only be a black hole if the researchers are 56 00:01:09,500 --> 00:01:09,510 be a black hole if the researchers are 57 00:01:09,510 --> 00:01:11,270 be a black hole if the researchers are indeed correct the object will be the 58 00:01:11,270 --> 00:01:11,280 indeed correct the object will be the 59 00:01:11,280 --> 00:01:13,280 indeed correct the object will be the closest black hole from earth discovered 60 00:01:13,280 --> 00:01:13,290 closest black hole from earth discovered 61 00:01:13,290 --> 00:01:17,450 closest black hole from earth discovered yet Peter had drama the co-author of the 62 00:01:17,450 --> 00:01:17,460 yet Peter had drama the co-author of the 63 00:01:17,460 --> 00:01:19,039 yet Peter had drama the co-author of the research said the team was totally 64 00:01:19,039 --> 00:01:19,049 research said the team was totally 65 00:01:19,049 --> 00:01:20,780 research said the team was totally surprised when we realised that this is 66 00:01:20,780 --> 00:01:20,790 surprised when we realised that this is 67 00:01:20,790 --> 00:01:22,880 surprised when we realised that this is the first stellar system with a black 68 00:01:22,880 --> 00:01:22,890 the first stellar system with a black 69 00:01:22,890 --> 00:01:24,710 the first stellar system with a black hole that can be seen with the unaided 70 00:01:24,710 --> 00:01:24,720 hole that can be seen with the unaided 71 00:01:24,720 --> 00:01:27,890 hole that can be seen with the unaided eye as a point of clarity the black hole 72 00:01:27,890 --> 00:01:27,900 eye as a point of clarity the black hole 73 00:01:27,900 --> 00:01:29,749 eye as a point of clarity the black hole itself isn't visible to the naked eye 74 00:01:29,749 --> 00:01:29,759 itself isn't visible to the naked eye 75 00:01:29,759 --> 00:01:32,300 itself isn't visible to the naked eye only the stars are for those in the 76 00:01:32,300 --> 00:01:32,310 only the stars are for those in the 77 00:01:32,310 --> 00:01:33,920 only the stars are for those in the southern hemisphere hoping to catch a 78 00:01:33,920 --> 00:01:33,930 southern hemisphere hoping to catch a 79 00:01:33,930 --> 00:01:36,109 southern hemisphere hoping to catch a glimpse it's located in the telescope 80 00:01:36,109 --> 00:01:36,119 glimpse it's located in the telescope 81 00:01:36,119 --> 00:01:38,420 glimpse it's located in the telescope ium constellation and will be best 82 00:01:38,420 --> 00:01:38,430 ium constellation and will be best 83 00:01:38,430 --> 00:01:40,700 ium constellation and will be best viewed during a clear night and two 84 00:01:40,700 --> 00:01:40,710 viewed during a clear night and two 85 00:01:40,710 --> 00:01:42,499 viewed during a clear night and two fuzzy bright pinpricks should be 86 00:01:42,499 --> 00:01:42,509 fuzzy bright pinpricks should be 87 00:01:42,509 --> 00:01:43,100 fuzzy bright pinpricks should be discernible 88 00:01:43,100 --> 00:01:43,110 discernible 89 00:01:43,110 --> 00:01:45,370 discernible without binoculars or a telescope 90 00:01:45,370 --> 00:01:45,380 without binoculars or a telescope 91 00:01:45,380 --> 00:01:47,690 without binoculars or a telescope although the object seems to have been 92 00:01:47,690 --> 00:01:47,700 although the object seems to have been 93 00:01:47,700 --> 00:01:49,520 although the object seems to have been ears all along it is escape detection 94 00:01:49,520 --> 00:01:49,530 ears all along it is escape detection 95 00:01:49,530 --> 00:01:52,160 ears all along it is escape detection until now not only as a black hole 96 00:01:52,160 --> 00:01:52,170 until now not only as a black hole 97 00:01:52,170 --> 00:01:54,920 until now not only as a black hole pretty small is also very quiet meaning 98 00:01:54,920 --> 00:01:54,930 pretty small is also very quiet meaning 99 00:01:54,930 --> 00:01:56,539 pretty small is also very quiet meaning it doesn't spew Jets of electromagnetic 100 00:01:56,539 --> 00:01:56,549 it doesn't spew Jets of electromagnetic 101 00:01:56,549 --> 00:01:57,679 it doesn't spew Jets of electromagnetic radiation 102 00:01:57,679 --> 00:01:57,689 radiation 103 00:01:57,689 --> 00:01:59,810 radiation unlike the supermassive ones at the 104 00:01:59,810 --> 00:01:59,820 unlike the supermassive ones at the 105 00:01:59,820 --> 00:02:01,550 unlike the supermassive ones at the Centers of galaxies guzzling up the 106 00:02:01,550 --> 00:02:01,560 Centers of galaxies guzzling up the 107 00:02:01,560 --> 00:02:02,770 Centers of galaxies guzzling up the stars 108 00:02:02,770 --> 00:02:02,780 stars 109 00:02:02,780 --> 00:02:04,840 stars the team has only managed to infer its 110 00:02:04,840 --> 00:02:04,850 the team has only managed to infer its 111 00:02:04,850 --> 00:02:06,490 the team has only managed to infer its existence from the wobble of the stars 112 00:02:06,490 --> 00:02:06,500 existence from the wobble of the stars 113 00:02:06,500 --> 00:02:08,770 existence from the wobble of the stars that orbited the team is hoping to 114 00:02:08,770 --> 00:02:08,780 that orbited the team is hoping to 115 00:02:08,780 --> 00:02:10,719 that orbited the team is hoping to capture images of the orbit to further 116 00:02:10,719 --> 00:02:10,729 capture images of the orbit to further 117 00:02:10,729 --> 00:02:13,060 capture images of the orbit to further establish the distance and mass of the 118 00:02:13,060 --> 00:02:13,070 establish the distance and mass of the 119 00:02:13,070 --> 00:02:13,940 establish the distance and mass of the system's objects 120 00:02:13,940 --> 00:02:13,950 system's objects 121 00:02:13,950 --> 00:02:21,890 system's objects [Music] 122 00:02:21,890 --> 00:02:21,900 123 00:02:21,900 --> 00:02:24,939 [Music]