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India Reaches Mars With Low-Cost Mission

India’s new entrant into orbit around Mars, the Mars Orbiter Mission (MOM), is a triumph for its  space agency and represents the fourth country to successfully send a spacecraft to the red planet. At a reported cost of $73 million, the mission is also a feat for lower cost exploration. Launched on November 5, 2013,…

MAVEN Arrives in Martian Orbit

MAVEN and Mars, two great things that now go together.

Watch Final Summer Supermoon Tonight

A supermoon is on the rise.

Newfound “Pitbull” Asteroid Will Zip By Earth on Sunday

Good news, folks: The world won’t end on Sunday, when an asteroid nicknamed “Pitbull” will zip past Earth. But asteroid 2014 RC will provide some virtual sky-watching drama for fans of celestial flybys. (Related: “Asteroids and Comets.”) Discovered independently by two different observatory teams on August 31, the 60-foot-wide (20 meters) space rock will come closest to Earth at…

NASA Preps Mars Orbiters for Comet Close Encounter

A cometary near miss for Mars in a few months means meteor risks for NASA’s spacecraft orbiting the red planet. On October 19, the comet Siding Spring will brush by Mars, passing so close that the space agency this week announced it has put together a special playbook filled with protective measures for its orbiters there.…

NASA’s Next Mars Rover Will Make Oxygen

NASA’s next Mars rover will pack a suite of sensors, cameras and an oxygen brewing kit.

Groundwater Depletion in Colorado River Basin Poses Big Risk to Water Security

Let’s step back for a minute and consider the implications of the study released last week on the depletion of groundwater in the Colorado River Basin. For anyone concerned about the future of the American West, the findings of this study – which was published online in the journal Geophysical Research Letters and conducted by…

Milky Way Punier Than We Thought

The Milky Way looks less hefty, but just as beautiful as ever, this summer.

101 Geysers Spotted Erupting From Saturn Moon

NASA’s Cassini spacecraft team have numbered the plumes of Saturn’s moon, Enceladus.

Space Station Astronaut Photographs, Tweets Gaza Conflict

An astronaut tweeted his “saddest’ picture from space, of conflict on Earth.

See Mars Map Landmarks for Yourself

A new Mars map makes a visual trip to the red planet possible for stargazers.

Name That Planet! Alien Worlds Looking for Winning Names

Tired of this planet? How about voting on a name for a newly-discovered one.

Watch Historic Meeting of Two Monster Asteroids in the Sky This Weekend

Ceres and Vesta—two of the biggest and brightest asteroids in the solar system—offer sky-watchers a record-breaking rendezvous as a treat over the holiday weekend. Not since their discovery more than 200 years ago has anyone observed these two giants of the main asteroid belt pair up so closely in the heavens. Since spring, keen-eyed sky-watchers…

Supreme Court Says EPA Can Regulate Greenhouse Gas Emissions

In the latest decision on the U.S. Environmental Protection Agency’s (EPA) authority to regulate carbon pollution, the U.S. Supreme Court reaffirmed EPA’s authority to regulate greenhouse gas emissions under the Clean Air Act, but voted 5-4 to limit permitting requirements. The ruling does not directly affect the EPA’s latest proposed rule to reduce greenhouse gas emissions from existing power plants, and…

NASA Launches Carbon Observatory

NASA’s carbon dioxide monitor has reached orbit.