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).

Jan 31, 2024 · UY Scuti is the largest star in the Universe observed so far. The red supergiant is 1,708 times wider than our Sun, with a radius of 1.2 billion km (738 million miles).

Nov 4, 2025 · 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 …

May 8, 2023 · The biggest star in the universe (that we know of), UY Scuti is a variable hypergiant with a radius around 1,700 times larger than the radius of the sun.

Sep 25, 2011 · This star is 1,650 times larger than our Sun, and If it were placed at the center of our Solar System, it would fill the Solar system beyond the orbit of Jupiter.

Dec 2, 2025 · While its immense scale dwarfs all the planets, making it appear to be a celestial giant from our perspective on Earth, the Sun is actually positioned toward the middle of the stellar size …

Feb 26, 2024 · The Sun will do something similar, but less extreme one day to become a red giant instead. However, physical size is only one way of conferring the title of biggest star.

Jun 24, 2025 · Explore the mind-boggling scale of stellar objects as we compare the Sun to the largest known stars in our galaxy.

Apr 22, 2025 · Many stars are much larger – but the Sun is far more massive than our home planet: it would take more than 330,000 Earths to match the mass of the Sun, and it would take 1.3 million …

Aug 8, 2024 · Our Sun is not a particularly large star. In fact, the universe is home to many celestial behemoths. Let's take a look at some of the largest known stars. While the Sun is the largest object …