Its four largest moons can be seen with ordinary binoculars.

"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if ...

How close to Earth could we find the next Earth-like exoplanet? This is what two papers accepted in The Astrophysical Journal Letters hopes to address as a team of more than two dozen researchers ...

Astronomers have found strong evidence of a giant gas planet orbiting a star in a solar system close to our own sun. Four light-years away from Earth, the Alpha Centauri triple-star system has long ...