It must have cleared all other celestial bodies, except its own moons, from its orbit.

This means that Pluto is not a planet, but a dwarf planet. In our solar system, there are five dwarf planets: Ceres, Haumea, Makemake, Eris and of course, Pluto. So, what does it mean to ‘clear ...

Hubble Space Telescope observations of white dwarf star G238-44 has shown that it is "consuming both rocky-metallic and icy material, the ingredients of planets," according to NASA's Goddard Space ...

Astronomers have been curious about the makeup of Ceres, the largest object in the asteroid belt, ever since its discovery by ...

The roughly six-hour flyby in 1986 revealed Uranus' protective magnetic field was strangely empty. Now, researchers say that ...

Recent data from the James Webb Space Telescope (JWST) suggests that a planet orbiting a small, red star 35 light years away ...

The nearby star Gliese 229 harbours a ‘brown dwarf’ companion: an object less massive than a star but more massive than a planet ... system. Yet, among the hundreds of billions of solar ...

Large galaxies, like the Milky Way, attract smaller galaxies. Our solar system's cosmic neighborhood spans 100,000 ...

So the brown dwarf that three decades ago was named Gliese 229B is now recognized as Gliese 229Ba, with a mass 38 times greater than our solar system's largest planet Jupiter, and Gliese 229Bb ...

"We have no way to determine how different exoplanets really look in detail yet, and this makes them a rich space for creativity." As shocking as it sounds today, prior to the 1990s, scientists ...

The solar system has nine planets, but in 2006 the International Astronomical Union declared Pluto a dwarf planet, making the total discovered planets count eight. But recently astronomers claimed ...

A 3D map of our cosmic neighborhood has revealed hot and cold regions as well as an "escape tunnel" from our local bubble.