After four years at Mercury, NASA’s Messenger orbiter has finished its remarkable mission and crashed into the planet.
New evidence suggests that nanoflares, small but potent bursts of energy, might heat the Sun’s atmosphere. But not everybody’s convinced.
Venus and Mercury star in early twilight. As evening grows late, look below the Moon for Saturn, and then below Saturn for Antares.
Too tired to bring the scope out? Stuck looking at the same dozen deep sky objects? Here are a few ways to get that observing fire back in your belly.
The three brightest planets — Venus, Jupiter, and Saturn — grace our evening skies this month. Mercury makes an appearance too!
Here’s your chance to name an exoplanet, in a process recognized and officiated by the International Astronomical Union. Register your astronomy club or organization by June 1st!
Clashes over building the premier telescope in the Northern Hemisphere and preserving Mauna Kea as a sacred site have intensified.