00:00Oh! Sun is so big!
00:04Yes, little kitty. But let me tell you..
00:07..our sun is not the largest star in the galaxy.
00:12Kidding!
00:16Well, in that case, let me take you and our lovely audience..
00:20..on a space tour to explore the little star.
00:24Well, in that case, let me take you and our lovely audience..
00:27..on a space tour to explore the largest twinkling stars..
00:31..in the Milky Way.
00:33Zoom in!
00:35Stars, as we have already learned so much about them..
00:39..in our previous videos.
00:41Please check them out afterwards.
00:43The links are provided in the description below.
00:48So, let's start with our very own sun..
00:51..aka a yellow dwarf star to compare with.
00:56It has a diameter of 865,370 miles..
01:04..making it the largest object in our solar system.
01:08It is so big that more than a million Earths could fit inside it.
01:14But you'll be surprised to know that the next star..
01:18..a red supergiant star called Antares..
01:22..located in the Scorpion constellation..
01:25..is estimated to be around 700 times the sun's diameter.
01:32Yes, it is large enough to engulf the orbit of Mars..
01:37..if the solar system was centered on it.
01:41But wait, this is just the beginning..
01:44..and let's move to the Orion constellation.
01:48Situated around 643 light years away from the Earth..
01:54..to witness a star named Betelgeuse.
01:58It is a red supergiant..
02:01..roughly 950 times as large as the sun..
02:06..and about 14,000 times brighter.
02:12Following this, let's move 4,900 light years away from Earth..
02:17..in the Cepheus constellation..
02:20..to witness VB Cephei..
02:23..which is around 1,050 times larger than the sun..
02:29..and Mu Cephei, a cool red supergiant..
02:34..about 1,260 times bigger than the sun..
02:39..which can be visible to the naked eye.
02:42Now let's travel to the Cygnus constellation..
02:46..located around 5,000 light years away from the Earth..
02:52..and look at KY Cygni..
02:55..a red supergiant of spectral class M3.5 La..
03:01..that ranges from 1,420 to 2,850 times larger than the sun.
03:11Following that, we have V354 Cephei..
03:16..situated in our Milky Way galaxy..
03:19..but is 9,000 light years away from the Earth..
03:24..and is around 1,520 times larger than our sun.
03:31The one larger than V354 Cephei is RW Cephei..
03:37..which is also located in the Cepheus constellation.
03:40This hypergiant variable star is about 1,535 times larger than the sun.
03:50Now, the time has come to meet the second largest star..
03:56..in the Milky Way galaxy..
03:58..and that is VY Canis Majoris..
04:03..located around 4,892 light years away from the Earth.
04:09This star is extremely rich in Oxygen..
04:13..and is 1,420 times larger than the sun.
04:18It's so large that its light takes about 8 hours..
04:23..to travel around its own equator.
04:27Isn't it fascinating, my friends?
04:30Indeed it is, but not as much as the largest star..
04:34..located right in the center of our Milky Way galaxy.
04:39The Ui Scuti.
04:41Yes, that's because it is not only the largest star in our galaxy..
04:47..but one of the largest stars found in the entire observed universe..
04:53..after Stephenson 2-18.
04:58The Ui Scuti is estimated to be around 1,700 times larger than our yellow dwarf sun..
05:06..which comes across as massive 1.1883 billion kilometers in size.
05:15Not only that, it is about 340,000 times more luminous than our sun..
05:23..because of which it can be clearly seen without a telescope from the Earth..
05:30..despite being 5,219 light years away from us.
05:36It is so big, we could fit 489 trillion Earths into the volume of this star.
05:46Put another way, if you replaced our sun with Ui Scuti..
05:52..Saturn would take the place of Mercury as the closest planet to the sun..
05:58..and everything else would be engulfed by this hyper giant star.
06:03Now that's big, really big!
06:08Trivia Time!
06:11Did you know the Ui Scuti was discovered by German astronomers..
06:16..at the Pond Observatory in 1860?
06:20Also, it is believed that Ui Scuti has begun to fuse helium..
06:27..and will eventually go supernova.
06:30And what is that?
06:32To know about it, please check our video on the same topic.
06:37Hope you learnt something fascinating today.
06:41Until next time, it's me Dr. Binocs, Zooming out!
06:48Sir, too small, let's replace it.
06:53Ah, never mind.
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