NASA's MESSENGER mission has revealed that Mercury, the solar system's tiniest planet and the closest to the sun, hides a big secret. When you purchase through links on our site, we may earn an ...

Fastest Planet in Solar System: Mercury is the fastest planet in the solar system because it orbits the Sun at an incredible speed of about 47 km per second, completing one full revolution in just 88 ...

This is the story of our cosmic neighborhood's front row. We explore the four rocky planets forged in the sun's heat: ...

The early years of our solar system were a period of unimaginable chaos and violence, a gravitational free-for-all where colliding planetary embryos competed for survival. In this tumultuous ...

"It is a world of extremes and contradictions, so I dubbed it the ‘Problem Child of the Solar System’ in the past." When you purchase through links on our site, we may earn an affiliate commission.

A new study disputes the prevailing hypothesis on why Mercury has a big core relative to its mantle (the layer between a planet’s core and crust). For decades, scientists argued that hit-and-run ...

KINGSPORT, Tenn. (WJHL) —This week, the night sky will provide the opportunity to view up to seven planets in our solar system. Mercury, Venus, Mars, Jupiter and Saturn will be visible to the naked ...