In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about the day-to-day of school ...

Scientists say Vallis Schrödinger and Vallis Planck—dramatic trenches near the lunar south pole—were carved in a blast that ...

A POWERFUL telescope floating in space has discovered an extremely rare Einstein ring of light around a nearby galaxy. The ...

The Universe is full of dust, and a striking new image from the Hubble Space Telescope highlights just how important it is.

Hubble’s high-resolution imagery allowed researchers to hone in on more of the Bullseye galaxy’s rings — and helped confirm ...