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Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km ; 432,300 mi ).
NASA's Hubble Space Telescope reveals the supercluster Westerlund 1, home of one of the largest known stars. Westerlund 1-26, a red supergiant, has a radius more than 1,500 times that of the...
UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum. It is also a pulsating variable star, with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility.
Stephenson 2-18 is a red supergiant located 18,900 light years from Earth. With a radius 2,150 times that of the Sun, it is currently the largest star known.
What is the biggest star in the universe? The largest known star in the universe is UY Scuti. It has an estimated radius of 1.188 billion kilometers. If UY Scuti were the center of our solar...
With that in mind, the following are the 10 largest stars currently known to astronomers. Betelgeuse, easily seen from October through March in the night sky, is the most well-known of the red supergiants. This is due in part to the fact that at roughly 640 light-years from Earth, Betelgeuse is very close compared to the other stars on this list.
None of the brightest stars in the sky are among the largest stars known. The largest first-magnitude stars, the red supergiants Betelgeuse in Orion and Antares in Scorpius, have radii of 640 – 1,021 and 680 solar radii.
Meet the biggest and largest stars in our Universe that are hundreds of times bigger than our own Sun. These include the biggest, UY Scuti.
UY Scuti holds the prestigious title of the largest known star, a red supergiant star that dwarfs even the most luminous stars in our night sky. As a hypergiant star, UY Scuti's immense size is almost incomprehensible, with a radius about 1,700 times larger than that of our Sun.
The biggest star in the universe is UY Scuti, a red supergiant star that is estimated to be over 1,700 times larger than our Sun. It is located in the constellation Scutum and has a diameter of approximately 2.4 billion kilometers.