Snapchat Planets, part of the Snapchat Plus Friend Solar System, ranks you in a friend’s top 8 based on your interactions, from Mercury (#1) to Neptune (#8). Each friend has their own solar system ...

The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

PRAGUE, Czech Republic — The universe really is expanding — astronomers are proposing to rewrite the textbooks to say that our solar system has 12 planets rather than the nine memorized by generations ...

Ever wondered how planetary systems like our own solar system form? Thanks to the European Space Agency's Gaia space ...

It is a question that feels like it should have a straightforward answer: how many planets are there in our solar system? Since Pluto was relegated back down to dwarf planet status, almost everyone ...

When I was a kid, there were nine planets. Now we know of thousands! But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might ...

1. What is a planet? -- 2. Seven perfect planets made of aether -- 3. The Earth becomes a planet -- 4. Sixteen planets -- 5. Not everything that orbits the Sun is a planet -- 6. Uranus! -- 7. The ...

A planetary conjunction is an astronomical event in which at least two planets – sometimes more – appear to our vantage from Earth to be close together in the sky. Both Venus and Jupiter are making ...

For a century, astronomers have been studying Barnard’s Star in the hope of finding planets around it. Excited scientists have found three more planets around Barnard’s Star, the second-nearest star ...