At the start of the year, Earth will quietly reach a milestone in its orbit around the sun. Known as perihelion, this is the moment when our planet is closer to the sun than at any other point in the ...

The Sun is the most important star in our solar system, acting as the central force around which all planets—including Earth—orbit. It provides the light and heat necessary for life to exist, making ...

"The planet gets in the way from the point of view of any one spacecraft, so we had to spread them around the planet to look everywhere all at once." When you purchase through links on our site, we ...

This is read by an automated voice. Please report any issues or inconsistencies here. CAPE CANAVERAL, Fla. — An asteroid that NASA used for target practice a few years ago was in fact nudged into a ...