Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

The dwarf planet 1 Ceres is in conjunction with the Sun at 5 P.M. EST today. While this means we can't see Ceres for now, we ...

Planetarium features a number of star shows and laser concerts during March specially designed for children, at 118 Lamington ...

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected ...

These popular astronomy questions, answered by Astronomy magazine, will help you better understand our universe - and share ...

Prepare to get schooled If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about ...

We're working continuously to improve our search results. If you aren't finding what you expect, please use our feedback form to share the search query and expected result with us so we can improve.

The Milwaukee County Zoo joined dozens of area school districts that decided to close Feb. 12 due to a snow storm that's ...

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.

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

Wolf 359’s extreme radiation and frequent X-ray flares make life-sustaining atmospheres on nearby planets highly unlikely, ...