Giant bubbles of hot gas more than 75 times the size of our sun have been observed on the surface of a nearby star, which researchers say may lead to better solar computer simulations.

These spots are even larger than the entire surface of our sun — which is why XX Tri has been dubbed "the most spotted star in the sky," Kővári said.

They can also brighten up our skies with colorful lights. But scientists have observed even bigger explosions with the power of a trillion hydrogen bombs from other stars that they call superflares.

For most of us, best imagination of cosmic scale takes us to the size of the Sun. After all, the closest star to the Earth is 109 times bigger than our home planet, and Earth is already one giant ...

All of the young stars appear to be no bigger than our sun. Scientists said the breathtaking shot provides the best clarity yet of this brief phase of a star’s life.

You're going to need more than just a telescope to get a glimpse of this hypergiant star. Here is what you need to know about the biggest star in the universe and how it compares to our Sun.

In the vast night sky, where countless stars vie for attention, one colossus reigns supreme as the largest star in the universe. Situated thousands of light-years from Earth, this celestial giant ...

The two black holes, approximately ten times more massive than our planet’s Sun, were discovered by a group of scientists, led Kareem El-Badry, who noticed their companion stars orbiting massive ...

The team identified 2,889 superflares on 2,527 of the stars, indicating that stars with similar temperatures and variability as our Sun produce superflares roughly once per century.