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.