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

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 ...

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. 21 ...

Scheduled to launch on Feb. 27, NASA's PUNCH mission could revolutionize space weather forecasts, unify the solar corona and ...

Mercury takes only 88 Earth days to orbit the sun.

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 ...

of the sun — just outside Mercury’s orbit — from where it took the images you see here. The sun is 93 million miles (148 million kilometers) from Earth. This high-resolution image shows the ...