23 July 2014, 04:56 PM ET
Scientists are still debating whether NASA's Voyager 1 spacecraft is in interstellar space, but a new study outlines a test that could definitively show where the far-flung probe is on its journey out of the solar system.
23 July 2014, 04:31 PM ET
As fighting continues in Israel and Gaza, astronauts living aboard the International Space Station can see signs of the deadly conflict from space.
23 July 2014, 03:29 PM ET
Hubble Space Telescope scientists are going to explain how they use the huge eye in the sky during a live chat Thursday (July 24).
23 July 2014, 02:09 PM ET
Photographs taken by ISS astronaut Alexander Gerst show the waging war on the Gaza strip and Israel. Gerst says "My saddest photo yet. From the International Space Station we can actually see explosions and rockets flying over Gaza and Israel."
23 July 2014, 01:08 PM ET
See photos from the European Space Agency's Automated Transfer Vehicle 5 (ATV-5) mission to the International Space Station in this Space.com gallery. ATV-5 is Europe's fifth and final planned ATV mission.
23 July 2014, 12:34 PM ET
U.S. President Barack Obama welcomed Buzz Aldrin and Michael Collin, the two surviving Apollo 11 astronauts, to the White House yesterday (July 22) to celebrate the 45th anniversary of the first moon landing.
23 July 2014, 10:20 AM ET
The agency's Chandra X-ray Observatory — one of NASA's 'Great Observatories,' along with the Hubble and Spitzer space telescopes and the now-retired Compton Gamma Ray Observatory — launched aboard the space shuttle Columbia on July 23, 1999.
23 July 2014, 08:46 AM ET
The NASA space-based telescope has delivered amazing imagery of the hidden Universe and expanded our knowledge of black holes, dark matter and the life and death of stars. It was launched on July 23rd, 1999 aboard the Space Shuttle Columbia.
23 July 2014, 07:41 AM ET
Apollo 11 astronauts Neil Armstrong, Buzz Aldrin and Michael Collins spent their last full day in space before landing gearing up for their Earth return. See how here.
23 July 2014, 07:24 AM ET
In the four decades since Apollo, no humans have landed on the moon. While NASA has no concrete plans to send astronauts back, other nations are talking about going there.
23 July 2014, 06:58 AM ET
The second team of comic book superheroes called "The Guardians of the Galaxy" appears in a new movie by Marvel Studios.
23 July 2014, 06:46 AM ET
Scientists have found hundreds of small pits on the lunar surface that could provide shelter to astronauts exploring the moon. Some of the pits, which are primarily located inside larger craters on the moon, are nearly 3,000 feet wide.
23 July 2014, 06:01 AM ET
A family of bright young stars group together against a background of glowing clouds in a new photo from an observatory in the Southern Hemisphere.
23 July 2014, 06:00 AM ET
The European Southern Observatory's La Silla Observatory imaged NGC 3293, a star cluster in the constellation Carina (The Keel), a site where sibling stars grow and generations evolve.
22 July 2014, 05:50 PM ET
NASA's New Horizons' mission, which blasted off in 2006, will become the first spacecraft to orbit Pluto in July 2015. The flyby will give researchers their first good look at the distant, frigid dwarf planet.
22 July 2014, 04:28 PM ET
The video, which SpaceX released today (July 22), shows a Falcon 9 first stage returning to Earth in a controlled fashion after helping launch six commercial satellites on July 14 for the firm Orbcomm.
22 July 2014, 03:59 PM ET
The private space company's Falcon 9 re-usable rocket technology was tested on its last flight on July 14th, 2014. Engine restart, landing legs and ocean touchdown at near zero velocity was recorded. See the launch: http://goo.gl/v8e5MS
22 July 2014, 02:57 PM ET
Created by lightning, ‘whistlers’ travel along Earth's magnetic field lines from hemisphere to hemisphere. Jupiter’s charged particles ‘sing’ across its magnetosphere (recorded by Voyager).
-- 'Whistling' Volcanic Lightning: http://goo.gl/kKhlEk
22 July 2014, 02:20 PM ET
Papers from the National Archives record the words President Nixon would have spoken had the Apollo 11 astronauts been unable to return to Earth.
22 July 2014, 11:22 AM ET
"Star Wars Episode VII" director J.J. Abrams is giving fans of the franchise their first look at the new movie's updated X-Wing — a fighter plane flown in the original trilogy — in a new video.
22 July 2014, 11:09 AM ET
NASA Fermi Gamma-ray Space Telescope detected a never-before-seen change in a binary star system in the constellation Sextants. The pulsar ceased its radio ‘beacon’ but started bright gamma ray emissions. This animation explains the behavior.
22 July 2014, 07:47 AM ET
On July 22, 1969, the three men on NASA's Apollo 11 mission were in the homestretch of their historic moon voyage. See how they fired the engines on their spacecraft.
22 July 2014, 07:01 AM ET
The newly discovered exoplanet Kepler-421b — which crosses the face of, or transits, its host star from Earth's perspective — takes 704 days to complete one orbit. Thus, it has the longest year known for any transiting alien world.
22 July 2014, 07:00 AM ET
The second Hawaii Space Exploration Analog and Simulation mission, known as Hi-SEAS 2, wraps up on Friday (July 25), ending four months of simulated Red Planet exploration on Hawaii's Mauna Loa volcano.
21 July 2014, 05:05 PM ET
Actor Morgan Freeman grilled NASA astronauts on the International Space Station about how their work can get humans to Mars someday.
21 July 2014, 04:09 PM ET
NASA honored the memory of Apollo 11 commander Neil Armstrong Monday (July 21), naming the Operations and Checkout building at the Kennedy Space Center in Florida after the first man on the moon.
21 July 2014, 03:40 PM ET
NASA's Apollo 11 moon landing was a human spaceflight feat, but also a dangerous journey. See some of the scariest moments of first manned moon landing as described by space historian and science writer Rod Pyle, author of 'Destination Moon.'
21 July 2014, 03:07 PM ET
What does the site of the first moon-landing look like 45 years later? A NASA probe orbiting the moon has recently beamed back new images of what Apollo 11's Tranquility Base looks like now.
21 July 2014, 12:22 PM ET
A high-flying package of live animals, plant seeds, and materials samples shot into space Friday (July 18) aboard a retrievable Russian Foton satellite, launching a two-month mission focusing on microgravity research into biological and physical sciences.
21 July 2014, 09:35 AM ET
NASA's Lunar Reconnaissance Orbiter (LRO) snapped imagery of the site where humanity took their first steps on the moon. An animator combined the photograph with a terrain map to create a 3D model of the Lunar Module (LM) descent stage.
21 July 2014, 09:00 AM ET
A dropship quadcopter designed by the European Space Agency could be landing rovers on Mars in the future.
21 July 2014, 08:40 AM ET
When U.S. astronauts make the next 'giant leap' launching to Mars, they will bring with them a memento from the first moon landing 45 years ago. NASA is presenting Kennedy Space Center with a mission patch flown on Apollo 11 for the first Mars crew.