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

Astronomers have discovered what seems to be a star racing through the Milky Way at 1.2 million mph, dragging a Neptune-sized ...

This artist's concept visualizes a super-Neptune world orbiting a low-mass star near the center of our Milky Way galaxy.

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

The Moon passes 0.3° south ... thanks to its proximity. Neptune, meanwhile, is so distant that it appears to shift only slowly relative to the background, and its disk spans just 2” — some ...

The discovery of Pluto is credited to Clyde Tombaugh, then just 24 years old, an amateur with no formal education in ... existed beyond the orbit of Neptune, then (and now) the most distant ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

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

"Pale Blue Dot" – one of the last photos taken by Voyager 1 – is still the most distant image of the Earth. Astronomer Carl ...

Read A sky chart showing Mars, Jupiter, Saturn, and Venus in a "planet parade." Credits: NASA/JPL-Caltech On most ...

the moon, and sometimes special events like meteor showers. Observing the night sky can be done with no special equipment, although a sky map can be very useful, and a good telescope or binoculars ...