Because the planets in our solar system are so bright, they flood the telescope's sensors with more light than they can ...

Nasa's powerful James Webb Space Telescope is showing us something humankind has never witnessed firsthand before: The birth ...

The Solar System seems calm, but that tranquility is more fragile than it appears. Now imagine one day looking up and noticing something unfamiliar in the sky. A tiny speck begins to grow larger, ...

Planets, like those in our solar system, form in a bottom-up process where small bits of rock and ice clump together and grow larger over time. But the heftier the planet, the harder it is to explain ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty? Our first stop is the International Space ...

Scientists have found a massive rocky world far beyond our solar system that is more than 20 times the mass of Earth.

Far beyond the planets, past even the most distant dwarf worlds, lies a vast shell of icy debris that marks the true outer ...

SPHERE’s detailed images of dusty rings around young stars offer a rare glimpse into the hidden machinery of planet formation. These bright arcs and faint clouds reveal where tiny planet-building ...

Japan's MMX mission will blast off soon to collect Martian moon samples. The spacecraft will orbit Mars for three years and ...

Our definition of a planet has changed over the years — causing a bit of confusion. | Credit: wasan prunglampoo/Getty Images Over the past 250 years, the number of "planets" in our solar system has ...

What is the difference between a moon and a planet? Trick question! According to scientific definitions, there often isn’t much of a difference at all. That might seem counterintuitive, but it’s true.