On Feb. 18, 1930, Clyde Tombaugh discovered Pluto, at that time classified as the ninth planet.

The European Southern Observatory's Very Large Telescope (VLT) imaged both of the planets directly, and PDS 70b has the ...

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 ...

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, ...

Five of the brightest planets will be visible to the naked eye. With help, you may even spot Uranus and Neptune.

"With an orbital period of 570 days, it is a relatively cold gas giant planet," said Guðmundur Stefánsson of the University ...