On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...

Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

For a brief moment at the end of February, every planet will appear in the night sky simultaneously in a rare celestial ...

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar system was the only planetary system known to humans. We had no proof other ...

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

Make time soon to head outside after the sun sets and study the sky. Five of the brightest planets — Venus, Jupiter, Mars, ...

Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant ...

A new study examines how much material from the closest star system to Earth will end up in orbit around the Sun, and how ...

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.

It’s neither fast nor food, but a spectacular object called HH 30 looks appetizing for astronomers in a new image from the ...