The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea ...

NASA has discovered a new world, named Gliese 12 b. It is roughly the size of Earth, lies in the habitable zone, and orbits every 12.8 days.

Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

This discovery offers a glimpse into the dramatic and explosive fates awaiting some of the universe's most fascinating ...

It was once thought that when an aging star engulfed a planet it would be a dramatic event. Now, the Webb telescope has ...

Astronomers have spotted two hefty white dwarf stars - highly compact stellar embers - orbiting close together that appear ...

The Helix Nebula, also known as Caldwell 63, is located 650 million light-years from Earth. It is the glowing remains of a dying star, much like our Sun.

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

The event will be ten times brighter than our Moon in the night sky, but never fear, it won't happen for another 23 billion ...

What remains is an incredibly dense core, roughly the size of Earth – a white dwarf. The two white dwarfs ... other than our solar system's innermost planet Mercury is to the sun, completing ...