A moment later, a second star to the far left underwent a similar explosion.

At the end of its lifetime, a star with more than about 20 solar masses can undergo gravitational collapse to form a black hole.

The stars may undergo variation in the level of flare activity over periods lasting several years.

But the 25-year-old star has been undergoing nonstop testing since he tore a muscle in his right shoulder last July 1.

When all stellar energy sources are exhausted, the star will undergo a gravitational collapse.

Once reached, the star becomes unstable and undergoes a runaway nuclear fusion reaction.

The same astronomers are using Newton's discoveries about the composition of light to interpret the complex changes the exploding star is undergoing.

Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime.

This star undergoes erratic changes in luminosity, varying between magnitude 9 to 13 over a period of weeks or months.

The star had undergone a supernova event approximately 100,000 years ago.