Latest Discoveries About Pluto, the Dwarf Planet
Pluto, originally considered the ninth planet, was recently classified as a dwarf planet and is the least massive planet in the solar system.
SDO on it's way, Falcon launch countdown, the colors of Pluto, head-on asteriod collision and cool images of craters on mars and the Orion Nebula.
The Hubble Space Telescope has returned the most detailed images of Pluto ever taken.
See the dwarf planet Pluto turn in this video based on images taken by the Hubble Space Telescope. They are most-detailed yet views of Pluto to date.
From snowfalls on Mars, to the polar craters of the moon, take a tour of the solar system’s chilliest spots.
Water is all over the solar system and the rest of the galaxy. What's it mean to the search for life?
What Hubble and its handlers will be observing over the coming year.
Pluto's status nowadays as a so-called plutoid and former planet may be official in the latest textbooks, but someone forgot to tell the astronomers.
An in-depth study of Pluto’s atmosphere reveals it is warmer, and contains more methane, than previously thought.
Nine mementos are riding to Pluto aboard NASA's New Horizons spacecraft.
The next three weeks will present an excellent opportunity to view Mercury.
The International Astronomical Union (IAU) announced the name of the solar system's fifth dwarf planet.
The word "planet" has meant many different things over the millennia and even still its definition is evolving.
Two planetary scientists duke it out over Pluto.
Scientists will convene this month to figure out what makes an object a planet.
SETI invites scuba divers on an expedition to a destination of your choice.