Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

When most people think of our Solar System, they think of the 8 planets officially recognized by the International Astronomical Union (IAU). But what if I told you there are at least 40 planets, and ...

Scientists want to study a distant world in the solar system that is classified as a dwarf planet. But some experts think it ...

Imagine waking up one morning to the news: a black hole is drifting close to our solar system. It sounds like the plot of a .

NASA has shared a video and photo of solar winds flowing through the Sun's corona from an extremely close distance. Coronal Mass Ejections impact Earth and other planets, and can prove dangerous to ...

Venus, shrouded in mystery, stands out with its toxic atmosphere and retrograde rotation, spinning in the opposite direction ...

Several planets stand still in the sky, Titan’s shadow transits Saturn, and Venus gives Taurus a second eye in the sky this ...

Some exoplanets in their stars' habitable zones may be distinctly uninhabitable due to solar flaring. Red dwarfs are known for powerful flaring, and since they're dim and their habitable zones are ...

Proxima Centauri b is the closest known exoplanet to our solar system that is thought to be within the habitable zone of its star.

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

Emily Kwong and Regina Barber of NPR's Short Wave talk about a comet visiting from interstellar space, caterpillars that eat ...

New images taken by NASA's James Webb Space Telescope show young stars forming within a "toe bean" on the Cat's Paw Nebula.