19 June 2014, 04:27 PM ET
A modest mountaintop blast in Chile kicked off construction of the largest optical/infrared telescope ever built on Earth.
19 June 2014, 02:56 PM ET
The bright center of a distant galaxy strangely and unexpectedly darkened recently, and now scientists think the culprit was a rare, powerful stream of gas blowing in front of it, eclipsing its heart.
19 June 2014, 02:24 PM ET
In 2013, astronomers became aware the center of galaxy NGC 5548 had seemingly gone dark. Astrophysicist Jelle Kaastra and team now think they know why: a stream of obscuring gas blown by the action of the central supermassive black hole.
19 June 2014, 08:57 AM ET
Using new observations from the Hubble Space Telescope, astronomers have been able to determine that dwarf galaxies were producing stars at a faster rate than previous studies. FULL STORY: http://goo.gl/j3ZB8m
19 June 2014, 08:01 AM ET
Galaxies are churning out new stars all the time, but most of the universe's stars formed between two and six billion years after the Big Bang. The new observations, by the Hubble space telescope, capture the dwarf galaxies during this dramatic epoch.
19 June 2014, 07:29 AM ET
The sun is supposed to be at the height of its 11-year active cycle, but for the most part things have been pretty quiet.
18 June 2014, 06:30 PM ET
An astronomy organization will blast away the top of a mountain to make room for a giant telescope tomorrow (June 19), and you can watch the explosion live online.
18 June 2014, 02:40 PM ET
During today's encounter — the 103rd Titan flyby for Cassini over its long operational life — the probe will skim just 2,274 miles (3,660 kilometers) above the moon at a speed of 13,000 mph (20,920 km/h), NASA officials said.
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, 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, 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, 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, 11:11 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, 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, 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, 03:00 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, 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, 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.
15 June 2014, 09:40 AM ET
What was your favorite space news story of the last week?
15 June 2014, 07:48 AM ET
NASA's Chandra X-ray Observatory captured this new image of the galaxy Messier 51 using X-rays.
14 June 2014, 11:03 AM ET
From "The Beast" asteroid to a "World Cup" in space, don't miss these amazing space images of the week for June 14, 2014.
13 June 2014, 08:38 PM ET
Capturing Venus pass before the sun is a rare sight that, if you missed it, you may not live to see.
13 June 2014, 11:31 AM ET
Astronomers using a giant radio telescope to investigate the most violent explosions in the universe, known as gamma-ray bursts, found something surprising in two distant galaxies: more dust and less gas than they expected.
13 June 2014, 09:16 AM ET
NASA researchers bounced radio signals off the huge near-Earth asteroid 2014 HQ124, nicknamed "The Beast" by some, as it whizzed by Earth just weeks after it was discovered.
13 June 2014, 07:00 AM ET
The agency's Orbiting Carbon Observatory-2 satellite is in final preparations for its July 1 liftoff. The OCO-2 mission is designed to provide a comprehensive global look at atmospheric levels of the heat-trapping greenhouse gas carbon dioxide.