NASA astronaut Nichole Ayers captured an electrifying image of a giant lightning "sprite" shooting up over Mexico and ...

A red giant star and white dwarf orbit each other in an NASA animation of a nova. The white dwarf explodes after years of stripping the red giant's atmosphere.

A time-lapse video released Wednesday (Sept. 11) shows enormous gas bubbles roiling on a nearby star called R Doradus, a red giant about 300 times bigger than our sun that lies roughly 180 light ...

Red giants reach such high temperatures that helium starts to fuse in the core to form carbon. If the star is large enough, it will eventually explode as a supernova, but if not, it will gradually ...

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 ...

Astronomers have discovered a planet that seems to have somehow survived an apocalyptic scenario. The hot Jupiter closely orbits a giant star that by all logic should have engulfed it, but the ...

This very active red giant star ejects bullet-like clumps of plasma toward its poles every 8.5 years, and it also has coughed out six large rings in its equatorial plane over the last 2,100 years.

Astronomers modeled sunspot activity on a nearby red giant star to learn about its chaotic interior. When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...

When the Sun expands into a red giant, it will swallow the inner solar system and raise the temperature in the outer regions. Skip to content Introducing the all-new Astronomy.com Forum!

Worlds around red giant stars—and others that don’t orbit any star at all—hint at an unexpected diversity of possibilities for planets and life in the universe. Skip to main content.

People always want to know what will happen to Earth when the sun eventually swells up as a red giant. For one thing, the expanding sun will turn the inner planets into cinders. It will almost ...