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Marcus Woo

Astronomers Get Closer Than Ever in the Hunt for Earth's Twin

The Space Missions and Events We're Most Looking Forward to in 2015

Why Is Rosetta's Comet Shaped Like a Duck?

13 of the Most Amazing Things Discovered in Space This Year

Mercury Once Oozed With Lava—Until the Planet Shrank

New Photos Released From Rosetta Comet Landing Mission

Designing a Mothership to Deliver Swarms of Spacecraft to Asteroids

Watch Live: Geminid Meteor Shower Peaks Tonight

Universe's fastest stars could hit light speed

The Fastest Stars in the Universe May Approach Light Speed

Rosetta Comet Mission Reveals Clues About the Origin of Earth's Water

Is That an Asteroid or a Comet? It's Getting Harder to Tell

Update: Test Flight Rescheduled for NASA Spacecraft That May Take Us to Mars

You Can Help Physicists Make the Next Higgs Boson Discovery

Beautiful Photos Show the Bizarre Behavior of Liquids

Spacecraft Bound for Pluto Prepares for Its Close Encounter

What's Next for the Rosetta Mission and Comet Exploration

This Is What It Sounded Like When We Landed on a Comet

New Geologic Map Shows the Beauty of the Asteroid Vesta

Watch Live: The Leonid Meteor Shower Peaks Tonight