Triple-Alpha Process

The rocky planet, roughly twice Earth's size, has offered astronomers a glimpse of one of Earth's possible futures — if it doesn't get engulfed by our expanding sun.

The sun is midway through its life of fusion. It's about 5 billion years old, and though its life is far from over, it will undergo some pronounced changes as it ages. Over the next billion years, the sun will continue to brighten.

A recently-published study suggests the red giant star Betelgeuse may have a sun-size companion which might affect the star's brightness and variability. The post A buddy for Betelgeuse? Does this mean no supernova? first appeared on EarthSky.

We all know the universe contains a vast array of elements, ranging from light gases, such as helium, to heavy metals, like lead. But where did all of the...

The enormous waves are the result of gravitational tides dragging around stellar material.

Nothing lasts forever, not even worlds. For our species to continue existing for the long-term, we might have to spread our eggs to a few different planetary...

Supernovae are beautiful, awe-inspiring, and deadly. This is your ultimate guide to nature's brightest explosions.

Nuclear fusion is the merging of two light atomic nuclei into one heavier one. If it can be harnessed on Earth, it could generate clean, limitless energy.

From life on Earth to the planet itself, there are four ways our planet will actually experience "the end," no matter how we define it.

Kochab and Pherkad are two stars in the Little Dipper that carry the nickname of the Guardians of the Pole. Here's how to find them and more.

Astronomers using the Large Binocular Telescope have discovered two unusual hot subdwarf stars: PG 1654+322 and PG 1528+025.

A red dwarf star is smallest and coolest type of star known. They're also extremely common, making up around 60 to 70% of the stars in the Milky Way. The post What's a red dwarf? Only the most abundant Milky Way star first appeared on EarthSky.

Why is a planet orbiting a star that should have gone through a giant phase?

The star brightened over May and June 2023, leading may to question if a supernova might be imminent.

Betelgeuse, the red star at the shoulder of the constellation Orion, has been acting strange, raising hopes for the spectacle of a lifetime

The amount of Helium-3 that lies on the surface of the Moon could be used on Earth as a source of energy, but it would imply a high cost and big obstacles.

The Hubble team has released a beautiful new image of the open star cluster NGC 2002.

The short answer: It depends on the size of the star.

Washington University in St. Louis is part of a collaboration that has yielded new insight into one of the universe's primordial reactions that made all life on Earth possible.

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