18 June 2014, 11:13 AM ET
Two astronauts humorously demonstrate zero-gravity during the Skylab 4 mission.
18 June 2014, 09:03 AM ET
Using bright galaxies known as quasars, scientists have calculated the rate of the expansion of the universe to an unheard of accuracy out to distances of nearly 12 billion light-years.
18 June 2014, 08:56 AM ET
Acoustic testing of NASA's new rocket, the Space Launch Systems (SLS) has begun on a scale model with injectors created using Selective Laser Melting, a 3D printing process in which fine powders are fused to build structure.
18 June 2014, 07:27 AM ET
Near-Earth asteroids have Earth-like orbits, so their collisions with our planet tend to be glancing blows from behind or from the side. But comets travel around the sun in more random paths and can thus slam into our planet head-on.
18 June 2014, 07:24 AM ET
In March, a team of researchers announced that they had found evidence of primordial gravitational waves, ripples in space-time from the universe's earliest moments. But other scientists have already begun questioning the discovery.
17 June 2014, 04:40 PM ET
Software that controls spacecraft is being adapted as a way to detect bank fraud.
17 June 2014, 04:35 PM ET
Six new cosmonauts joined the ranks of Russia's space agency on Monday (June 16), two short of the eight candidates who started basic training for the job two years ago. Among the two who did not make the cut was the group's only woman.
17 June 2014, 03:10 PM ET
The two different classes of jet-spewing active galaxies called blazars may, in fact, be a single hybrid type that evolves over time, according to new research.
17 June 2014, 03:05 PM ET
Need a caffeine hit in space? For astronauts on the International Space Station, it will take less than two minutes to brew an espresso in a coffee machine slated for launch next year.
17 June 2014, 02:17 PM ET
Angry Birds and NASA have teamed up for the second time to develop a new version of the popular game. The new iteration of the Angry Birds franchise sends players to the space agency's next cosmic target — asteroids.
17 June 2014, 01:01 PM ET
The Chandra X-ray Observatory detected over 400 x-ray sources within the galaxy. Several of them are X-ray binary systems that contain a neutron star or black hole orbiting a Sun-like star. FULL STORY: http://goo.gl/Dt5Abv
17 June 2014, 12:30 PM ET
NASA's Solar Dynamics Observatory captured imagery of a plasma burst on May 27th, 2014. A period of two hours is seen in the video, looped several times.
17 June 2014, 11:22 AM ET
The Gemini 4 spacecraft awaits recovery with the green marker dye coloring the ocean water.
17 June 2014, 11:11 AM ET
The National Weather Service says at least two tornadoes have touched down in northeast Nebraska, causing widespread damage in the town of Pilger. (June 16)
17 June 2014, 10:00 AM ET
The proposed Wide-field Infrared Survey Telescope (WFIRST) mission, which NASA is designing to probe the nature of mysterious dark energy, could discover thousands of alien planets as well.
17 June 2014, 07:37 AM ET
How to see two creatures that loom large in June's night sky — the constellations Centaurus (the Centaur) and Lupus (the Wolf).
17 June 2014, 07:35 AM ET
Getting astronauts to the Red Planet is the chief long-term goal of NASA's human spaceflight program, so the agency is developing many technologies to help make that happen, including a new line of prototype spacesuits called the Z-series.
17 June 2014, 12:54 AM ET
Enormous telescopes are in development, and if the Hubble Space Telescope's legacy is any indication, their results will transform astronomy.
16 June 2014, 05:56 PM ET
Three volunteers stepped out of China's Lunar Palace 1 last month after a 105-day shakeout mission — not on the moon, but at the Beijing University of Aeronautics and Astronautics.
16 June 2014, 05:00 PM ET
Space tourism firm Space Adventures says two customers have paid deposits for a flight around the moon on a Soyuz spacecraft, but the trip requires major changes to the Russian crew capsule, a vehicle that has seen only incremental upgrades recently.
16 June 2014, 03:27 PM ET
Scientists will use the space agency's Hubble Space Telescope to search for another faraway object that could be visited by the New Horizons mission after the Pluto encounter, which is scheduled to take place in July 2015.
16 June 2014, 03:11 PM ET
Europe's most active volcano - Mount Etna, on the Italian island of Sicily - continued to erupt on June 16th, 2014. Spectacular footage show the eruption from its southern crater.
16 June 2014, 03:04 PM ET
Astronauts in the C-131 "vomit comet" simulate weightless flight.
16 June 2014, 03:00 PM ET
Astronomers now have a powerful new tool to sniff out methane on alien planets. The organic molecule, considered one of the building blocks of life, could be key to finding organisms beyond Earth.
16 June 2014, 02:52 PM ET
An Italian coffee company builds the first zero-gravity espresso machine, the ISSpresso, to send along with an Italian astronaut launching into space this fall. Jen Markham explains.
16 June 2014, 01:12 PM ET
The James Webb Space Telescope will be folded up for its launch to an orbit nearly a million miles from Earth. Voice actor Peter Cullen describes how its 'transformed' to a working telescope and the science it will perform.
16 June 2014, 11:45 AM ET
Earth's gravitational pull is so powerful that it creates a small bulge on the surface of the moon. For the first time, scientists have observed this bump from orbit, using NASA satellites.
16 June 2014, 11:24 AM ET
The International Space Station is getting a critical upgrade: its first coffee machine. The "ISSpresso," a capsule-based espresso machine, will enable astronauts to brew the hot caffeinated beverage as an alternative to instant coffee.
16 June 2014, 07:30 AM ET
The blood flow in the human body changes in microgravity, fluids shift away from legs and up towards the head. This ncreases cranial pressure and causes optic nerve compression, flattening of the back of the eyeball and optic disc swelling.
16 June 2014, 07:26 AM ET
A NASA spacecraft arriving in the Pluto system next year could help scientists figure out if the dwarf planet's largest moon Charon might have once harbored a subsurface ocean of liquid water.
16 June 2014, 07:15 AM ET
Samples scooped from the Martian atmosphere could provide scientists with their first hands-on experience with the red planet.
15 June 2014, 09:40 AM ET
What was your favorite space news story of the last week?