red giant

1 in 10 Red Giants are Covered in Spots, and They Rotate Surprisingly Quickly

Sunspots are common on our Sun. These darker patches are cooler than their surroundings, and they're caused by spikes in…

2 months ago

Antares is a supergiant star that would fill the Solar System beyond Mars, but its atmosphere is 12 times bigger than that

Antares, the angry red eye of the constellation Taurus the bull, is a red supergiant star near the end of…

3 months ago

We Know We’re Made of Stardust. But Did it Come From Red Giants?

We've all heard this one: when you drink a glass of water, that water has already been through a bunch…

10 months ago

This Star Has Reached the End of its Life

About 10,000 light years away, in the constellation Centaurus, is a planetary nebula called NGC 5307. A planetary nebula is…

1 year ago

Why Doesn’t Earth Have Rings?

You'd think Saturn has all the luck, with its awesome rings. But it turns out, living on a planet with…

4 years ago

What Are Multiple Star Systems?

Not all stars are alone. Some come in pairs and more. And when there are multiple stars in a system,…

4 years ago

What is a Nova?

We’ve talked about supernovae plenty of times, but what about just regular, plain old novae? What are they, and how…

4 years ago

What if Earth Stopped Orbiting the Sun?

What if the Earth just stopped dead in its tracks while orbiting the Sun? It would plummet straight down of…

4 years ago

What is the Biggest Star in the Universe?

If our Universe could be likened to a playground, our Sun would be one of the little kids playing in…

4 years ago

What is the Life Cycle Of The Sun?

Like all stars, our Sun has a life-cycle that began with its birth (4.57 billion years ago) and will end…

5 years ago