Scientists Discover That Mars is Full of Water

Looking closely at a pair of meteorites originating from Mars, researchers now believe the planet likely holds vast reservoirs of water deep underground

No one is going to Mars until scientists figure out how to shield travelers from deadly radiation.

Mission to Mars: The Radiation Problem

NASA wouldn't opt to expose astronauts to a 19 percent increased risk of cancer, but there's no telling what a reality TV show would do


When Galaxies Collide: The Fate of the Milky Way

The Hubble Space Telescope shows that we're on a collision course with the nearby Andromeda galaxy—and set to crash in about 4 billion years


In Case You Missed It: the Transit of Venus

If you didn't have a chance to see yesterday's astronomical event, watch this NASA video to see what all the fuss is about

The previous transit of Venus in front of the sun was in 2004, pictured above. The next won't be until 2117.

How To View This Evening’s Transit of Venus

A few quick tips to keep in mind as you take advantage of the last chance to see Venus pass in front of the sun


Your Last Chance to See Venus Pass in Front of the Sun

The transit of Venus is so rare that only 8 transits have occurred since the invention of the telescope


Today Is Your Last Chance This Lifetime to See Venus Pass in Front of the Sun

Venus' next transit of the sun isn't until 2117—so read about what to watch for and make sure to look to the skies

The October 3, 2005 annular eclipse, as seen from Spain

The ‘Ring of Fire’ Eclipse You Might See Sunday

For the first time in 18 years, a solar eclipse will be visible in the continental United States


Picture of the Week: Stephen Hawking in Zero Gravity

The renowned physicist enjoyed the sensation of weightlessness while 24,000 feet over the Atlantic

One of the many mysteries baffling astronomers is how galaxies such as the Milky Way are able to form new stars at an unsustainable rate.

Top Ten Mysteries of the Universe

What are those burning questions about the cosmos that still baffle astronomers today?

Scientists calculated how to make a force field big enough to fit the Millennium Falcon.

May the Fourth Be With You: The Science of the Millennium Falcon

On Star Wars day, we take a look at the science behind the series' most popular spacecraft and the force fields it flies through

The supermoon of March 2011, rising behind the Lincoln Memorial In Washington, DC

The Biggest Supermoon in Years is Coming Saturday Night

The moon's closest approach to earth will coincide with a perfectly full moon


Fast Forward: The Dark Energy Camera

Get a sneak peak at the new project that will search for mysterious cosmic energies that drive our universe

Billions of miles from Earth, the probes prepare to break out of the “bubble” of solar particles.

Timothy Ferris on Voyagers' Never-Ending Journey

With the spacecraft poised to leave our solar system, the writer who helped compile the time capsules they carry reflects on our foray into outer space

Armored Train in Action (1915) by Gino Severini. Italian Futurist paintings adopted a Cubist visual vocabulary but were bolder and brasher.

Futurism Is Still Influential, Despite Its Dark Side

The Voyagers are still within the heliosheath, the outer layer of the solar system

Voyager Probes Not Out of the Solar System Just Yet

New data show that nearly 35 years after their launches, NASA's Voyager probes are now at the outermost reaches of the solar system

Is mining asteroids the next space frontier?

To the Asteroids and Beyond

A group of big-name tech billionaires wants to open up a new frontier in space--mining space rocks

The Golden Record consists of 115 analog-encoded photographs, greetings in 55 languages, a 12-minute montage of sounds on Earth and 90 minutes of music.

What Is on Voyager’s Golden Record?

From a whale song to a kiss, the time capsule sent into space in 1977 had some interesting contents

Monday's solar eruption at its peak moment

Picture of the Week: A Spectacular Solar Eruption

Earlier this week, a NASA telescope captured one of the most stunning solar flares in years

A selection of a new image of distant galaxies in the COSMOS field. Click to see the whole view.

Picture of the Week: A Deep View of the Universe

A new survey of a slice of the distant reaches of the universe reveals 200,000 galaxies

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