Making a precise measurement of the sun is difficult, but the August 21 eclipse will offer scientists an opportunity to refine their calculations.
Choosing which asteroids will be worth the mining trip is a critical problem — and astronomers are in a position to play a crucial role in that determination.
Here's how NASA scientists figure out exactly where the moon's shadow will fall on the surface of the Earth, down to the city block.
Nearing the end of its extended mission to Saturn, NASA's Cassini probe continues to provide scientists with new insights about the planet and its moons.
The solar wind and the sun's magnetic field act as a protective bubble around the solar system and shield it from cosmic rays.
Astronomers caught an extremely rare phenomenon: a galaxy positioned perfectly to give them a peek at a distant supernova through a gravitational lens, magnified 50 times.
While there are atmospheres around much larger gas giants orbiting other stars, this is the first evidence of an atmosphere around an exoplanet that's near Earth's size.
Two weird pulsars serve as extremely powerful and accurate cosmic clocks — some of the time.
This month, the famous meteor shower could be very intense, spawning up to 200 "shooting stars" per hour if you have clear skies.