What is a Planet?
Our understanding about the universe and our place in it has changed over time. New information can cause us to rethink what we know and reevaluate how we classify objects in order to better understand them.

Voyager Makes an Interstellar Discovery
The solar system is passing through an interstellar cloud that physics says should not exist. In the Dec. 24th issue of Nature, a team of scientists reveal how NASA's Voyager spacecraft have solved the mystery.

Sandtrapped Rover Makes a Big Discovery
Despite being stuck, Mars Exporation Rover Spirit has made intriguing discoveries simply by spinning its wheels in deep sand.

Water on the Moon
The argument that the Moon is a dry, desolate place no longer holds water. Preliminary data from NASA's indicates water existis in a permanently shadowed crater on the Moon.

Lunar LADEE
Scientists want to take advantage of a quiet spell to study the Moon's thin atmosphere before the planned increase in human activity.

Daylight Saving Time
Spring forward. Fall back. The basic idea of Daylight Saving Time is to make the best use of daylight by shifting the clock.

Giant Ribbon Discovered at the Edge of the Solar System
NASA's IBEX spacecraft has made the first all-sky maps of the heliosphere and the results have taken researchers by surprise. The maps are bisected by a bright, winding ribbon of unknown origin.

Galileo on Galileo, Part II
What would Galileo think of the discoveries made by the spacecraft that carried his name to Jupiter? In honor of the 20th anniversary of the spacecraft's launch, Galileo science team members imagine a look back through the eyes of Galileo.

Galileo on Galileo, Part I
What would Galileo think of the discoveries made by the spacecraft that carried his name to Jupiter? As the spacecraft approached Jupiter In 1995, members of the Galileo science team imagined a look back through the eyes of Galileo.

Juno Mission to Jupiter: Unlocking the Secrets of a Giant Planet
NASA's Juno mission is preparing to embark on a mission to unlock the secrets of our solar system's largest planet.