The eight major planets of our Solar System orbit the Sun in the same flat plane, and all at different speeds. Mercury, the closest planet to the Sun, completes an orbit – a year for the planet ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

When you first learned about the Solar System, you probably saw diagrams that made it look orderly, with planets arranged in circular orbits around the Sun on a flat disk. But in reality, our Solar ...

Stargazers will be treated to a rare alignment of seven planets on 28 February when Mercury joins six other planets that are already visible in the night sky. Here's why it matters to scientists.

Missing planets? That literally happens all the time IRL. Here's why the Star Wars trope of incomplete star maps and missing ...

Alongside the most accurate and detailed imagery ever ... Early in the story of The Planets, the solar system was home to a beautiful water world. But this was not Earth - this was the young ...

The planets in our solar system orbit the sun essentially along a line across the sky in a plane called the ecliptic. For that reason, planets in our Earthly sky always appear somewhere along a ...

To better understand why the planets have variable compositions ... to the formation of the gas and ice giants in the outer solar system. This first-order model of planetary growth in the solar ...

Scientists now think that a mysterious object massive enough to have gravitational interactions with the Solar System’s disk and planets flew by billions of years ago and permanently altered their ...