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
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
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 ‘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
Top Ten Mysteries of the Universe
What are those burning questions about the cosmos that still baffle astronomers today?
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 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
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
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
To the Asteroids and Beyond
A group of big-name tech billionaires wants to open up a new frontier in space—mining space rocks
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
Picture of the Week: A Spectacular Solar Eruption
Earlier this week, a NASA telescope captured one of the most stunning solar flares in years
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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