The Sun may be the center of our solar system, but it is not the biggest star in the universe. The Sun has a mean radius of around 696,000 kilometers, or 432,450 miles . In comparison to UY Scuti ...

For XX Trianguli, which is 630 light-years from Earth, the photocenter of the stellar disk can shift up to 10% of the star's radius relative to its geometric center, causing a displacement of 24 ...

Red dwarf stars don't get the attention that they deserve. Everybody focuses on the big flashy stars in the universe, the breakout hits. The giant blazing blue and red stars that will someday die ...

A new study suggests that a specific kind of galaxy might hold 10 times more red dwarf stars than estimated. That would triple projections for the number of stars in the observable universe, with ...

This red giant phase will signal destruction for inner solar system planets, including Earth. Other stars in the universe will experience the same fate as our sun, meaning any exoplanets orbiting ...

The universe is expanding, but the rate of that expansion is proving to be elusive. A new measurement of the universe’s expansion rate falls between two previously established rates, leading to ...

He said SPLUS J2104−0049 – a red giant star with about 80 percent of the mass of the sun – is at least 10 billion years old and possibly just a few million years younger than the universe ...

An artist’s concept of a small red dwarf star is shown above. NASA/Walt Feimer One of the oldest stars in the universe is quietly hiding out in the Milky Way some 2,000 light-years from Earth.

The universe is expanding, but the rate of that expansion is proving to be elusive. A new measurement of the universe’s expansion rate falls between two previously established rates, leading to ...