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).

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 …

Dec 21, 2025 · UY Scuti is known as the Biggest Star in the Universe in the Milky Way and ranks among the most massive ever identified. Its size surpasses the Sun by over 1,700 times, making it an …

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).

Meet UY Scuti, widely regarded as the largest known star in the universe. Located 9,500 light-years away in the Scutum constellation, this red supergiant has captured the imagination of astronomers …

Mar 29, 2025 · Yet, among these titanic celestial bodies, one star stands out as the true giant: UY Scuti, the largest known star in terms of volume. In this article, we will delve into the intricate details of UY …

Feb 26, 2024 · UY Scuti is often called the biggest known star in the Universe, but is that true? A guide to the red hypergiant and how big it really is.

Stephenson 2-18 is recognized as one of the largest stars by stellar radius. This red supergiant or red hypergiant is located approximately 18,900 to 20,000 light-years from Earth in the constellation Scutum.

Feb 9, 2025 · But what are the biggest stars in the universe, and just how big can a star really be? Let’s explore the largest stars in the universe and uncover their incredible scale!

The largest stars in the known universe, listed here, are mostly cool red supergiants and hypergiants. Their radii are notoriously difficult to measure for several reasons.