Following this discovery, UY Scuti was officially named the largest known star in the galaxy, surpassing previous record holders such as Betelgeuse, VY Canis Majoris, and NML Cygni. Our enormous, distant friend, UY Scuti, would be 125,000 feet … UY Scuti was the largest since Westerlund 1-26, but since UY Scuti has a smaller size estimate than Stephenson 2-18 It should be that Stephenson 2-18 is the largest. “(W)hile UY Scuti is only around 30 times more massive than the sun, it has a radius somewhere in the region of 1,700 times larger than the radius of the sun,” says Scudder. UY Scuti is located in or galaxy the Milky Way, at about 5.219 light-years away from Earth. VY Canis Majoris has a diameter of almost 2 billion kilometers. VY Canis Majoris has a diameter of almost 2 billion kilometers. Further to this, current best estimates is that our galaxy (remember, containing up to 400 billion starts), is only one of 2 trillion galaxies in the observable universe. It’s easy to feel small under a starry night sky, but in order to begin to grasp just how small we truly are, we must know what our relative size is compared to the larger celestial bodies of the Galaxy — and what makes a better point of comparison than a star? This star is one of a class of stars that varies in brightness because it varies in size, so this number is also likely to be physically changing over time. Wrapping one’s head around such number can be difficult, so let’s break this down a bit. UY Scuti is the largest known star. In terms of physical size UY Scuti, has a radius more than 1,700 greater than the sun, but it’s only 30 times the sun’s mass.. Consider the Following. On a stellar scale, it's really quite average — about half of the known stars are larger; half are smaller. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,188,426,400.00.km. Now imagine a sphere that large. For decades, theories have suggested that no stars can be born by ordinary processes above 150 solar masses. What makes a star big might be its mass (like R136a1) or its physical size (like UY Scuti and the two other stars mentioned here). Enter UY Scuti, a bright red supergiant variable star that resides within the Scutum constellation and is currently believed to be the largest star in the Milky Way galaxy. It is one of the largest known stars by radius at 1,708 ± 192 solar radii, corresponding to the diameter of 2,375,828,000 kilometers. UY_Scuti_zoomed_in,_Rutherford_Observatory,_07_September_2014. UY Scuti changes its brightness but it can be viewed from Earth as it is a pulsating star. It’s thought to be about 265 times more massive than our sun. How big can stars get? If you were to fly a Boeing 777 airplane around UY Scuti, it would take over 1,200 years to make the trip. It’s the most massive star known at this time. Is there any planet/star bigger than VY Canis Majoris? UY Scuti is just plain big, with a radius 1,700 times that of our sun. Various properties of UY Scuti star will be … That's how big UY Scuti is. Some speculate the star may be even larger, enough to extend beyond the orbit of Saturn. To give you perspective of how big this star is, we would require 489 trillion Earths to fit into the volume of this star. In a closely packed star cluster, double-stars are more likely to encounter each other and merge. In 2012, astronomers at the University of Bonn suggested the the ultramassive stars in the Large Magellanic Cloud – such as R136a1 – were created lighter stars in tight double-star systems merged. Our enormous, distant friend, UY Scuti, would be 125,000 feet in diameter, which is just a smidge under 24 miles. Today, she serves as Editor-in-Chief of this website. UY Scuti is the largest star in the universe, at least that we know about, and is located a whopping 9,500 light years away! UY Scuti is the brightest star in the image. at the Bonn Observatory in 1860, but it wasn’t until astronomers observed UY Scuti through the Very Large Telescope in Chile’s Atacama Desert in 2012 that the star’s true size became well documented. We haven’t even touched the distance between us and the supermassive star —Â. This star is one of a class of stars that varies in brightness because it varies in size, so this number is also likely to be physically changing over time. Image via Wikipedia. UY Scuti is just plain big, with a radius 1,700 times that of our sun. It was first observed by German Astronomers in 1860 at that time it was named as 'BD 125055' but when it was observed for second time then it's name changed to UY SCUTI. UY Scuti Radius has been calculated as being 1,708.00 times bigger than the Sun. UY Scuti. It is the biggest star that has been discovered so far, even bigger than VY Canis Majoris, which is part of the constellation Canis Major. R136a1 is the heaviest star, with 265 times the sun’s mass. We haven’t even touched the distance between us and the supermassive star — approximately 2.9 kiloparsecs, or 9,500 light years — but that’s a topic for another day. And it’s not alone in dwarfing Earth’s dominant star. Wikimedia Commons. If you were traveling in a plane at 900km, it would take 1,150 years just to circle it at ONCE. It’s only 30 times the sun’s mass, but has a radius more than 1,700 greater than the sun. It’s only 30 times the sun’s mass, but … And there are gigantic stars, in terms of sheer physical size. Near-infrared image of the R136 cluster, from ESO’s Very Large Telescope. UY Scuti. Located some 9,500 light-years away, this star is the leading candidate for being the largest known star. In other words, this single star is so large that its outer surface would extend far beyond the orbit of the planet Jupiter (which lies about five times farther from the sun than Earth). 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