Add Yahoo as a preferred source to see more of our stories on Google. There are many pieces of evidence to help explain why the Earth spins, and some major mysteries. Jose Luis Pelaez ...

Every year in early January, Earth reaches the closest point in its orbit to the Sun, a moment astronomers call perihelion.

Why does the Earth’s tilt create our season? The Earth orbits the Sun, but with a tilt. That tilt is important to those of us on the planet because it creates our seasons. How does that work? What ...

Add Yahoo as a preferred source to see more of our stories on Google. The sun shines above the Earth’s horizon. Perihelion, the point when Earth is closest to the Sun, occurs annually in early January ...

Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once a year, and it rotates on its axis about once a day (depending on your ...

Discover how the Earth started spinning, the impact of the Theia collision, and how the Moon's gravity is gradually slowing ...