Everyone knows that the Earth rotates in space, which is why we have the day and night cycle. What many people may not realize, however, is that the sun is also rotating. It takes about 25 days ...

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

Here’s how it works. The term "perihelion" describes the point in an astronomical body's orbit where it is nearest to the sun. Derived from the Greek words peri (around) and helios (sun), the ...

So why has the sun been rising later than it did on Dec. 21? Like much of our day and night cycles, the answer lies in Earth's rotation and orbit. Yes, the sun has risen later than it did Dec.

While the Earth is spinning to give us day and night, it is also moving around the Sun. This movement is called an orbit. One orbit of the Earth around the Sun is how we measure one year.