Like a celestial parade across the cosmos, five bright planets are lighting up the night sky and visible with the naked eye ...

Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...

Data collected by NASA's InSight lander suggest that ancient internal processes are responsible for the "Martian dichotomy" ...

The cosmos is making sure every zodiac sign sees the lesson in every challenge, so get ready to roll with the punches! In ...

Each planet is imagined as a stand-up comic, bringing its unique traits to the stage. Mercury's quick wit, Venus's charm, ...

Arizona's state bird fends for itself against predators in the desert, making its home in prickly plants. Here's what to know ...