Author Mark Anderson of 'The Day the World Discovered the Sun' explains how the transit of Venus allowed 18th-century astronomers to create an early GPS system.
Data from the orbiter DAWN confirm theories about the history of Vesta, which dates to the early days of planet formation. The protoplanet is also home to the solar system's second largest mountain.
Effulgent Venus will show just beside the moon today. Also, some cues on how to observe this rare and beautiful event.
New information collected by NASA's Messenger shows that Mercury was more geologically active than scientists previously thought.
New results from NASA's MESSENGER spacecraft show Mercury to have features unlike anything scientists have seen elsewhere in the solar system. Here's one: a huge core for a planet this size.
Beginning tonight, the two brightest planets in the sky will be so close together that you'll be able to block both of them out with a few fingers held at arm's length.
The recent solar flares provide a dramatic backdrop for a study that shows Mars gets far more of its atmosphere stripped away by solar storms than does Earth. Thank you, magnetosphere.
Dione's atmosphere was detected by NASA's Cassini spacecraft, which spotted an ultra-thin layer of oxygen ions so sparse that it is equivalent to conditions 300 miles above Earth.
This past weekend, three planets joined the moon in a rare alignment. On Monday, these celestial bodies will be joined by Mercury.
The findings nearly double the number of bona fide planets found outside our solar system by the Kepler space observatory.