Surface structures are becoming visible in new images of comet 67P/Churyumov-Gerasimenko taken by the scientific imaging system OSIRIS onboard the European Space Agency's Rosetta spacecraft. The resolution of these images is now 330 feet (100 meters) per pixel. One of the most striking features is currently found in the comet’s neck region. This part of 67P seems to be brighter than the rest of the nucleus.
As earlier images had already shown, 67P may consist of two parts: a smaller head c [...]
The six-person Expedition 40 crew enjoyed an abbreviated workday Thursday, having worked late the previous night to welcome the arrival of a Russian cargo craft a little less than six hours after its launch from Kazakhstan.
The ISS Progress 56 resupply spacecraft, packed with almost three tons of food, fuel and supplies, automatically docked to the station’s Pirs docking compartment at 11:30 p.m. EDT Wednesday. The space freighter launched from the Baikonur Cosmodrome in Kazakhstan at 5:44 [...]
Stunning new observations from Frontier Fields.
Astronomers using the NASA/ESA Hubble Space Telescope have mapped the mass within a galaxy cluster more precisely than ever before. Created using observations from Hubble's Frontier Fields observing programme, the map shows the amount and distribution of mass within MCS J0416.1–2403, a massive galaxy cluster found to be 160 trillion times the mass of the Sun.
"The depth of the data lets us see very faint objects and has allowed us to ide [...]
The Sunshield on NASA's James Webb Space Telescope is the largest part of the observatory—five layers of thin membrane that must unfurl reliably in space to precise tolerances. Last week, for the first time, engineers stacked and unfurled a full-sized test unit of the Sunshield and it worked perfectly.
The Sunshield is about the length of a tennis court, and will be folded up like an umbrella around the Webb telescope’s mirrors and instruments during launch. Once it reaches its orbit, the [...]
Astronomers using NASA's Hubble Space Telescope have gone looking for water vapor in the atmospheres of three planets orbiting stars similar to the sun -- and have come up nearly dry.
The three planets, known as HD 189733b, HD 209458b, and WASP-12b, are between 60 and 900 light-years away from Earth and were thought to be ideal candidates for detecting water vapor in their atmospheres because of their high temperatures where water turns into a measurable vapor.
These so-called “hot Ju [...]
NASA has issued a Request for Information (RFI) to investigate the possibility of using commercial Mars-orbiting satellites to provide telecommunications capabilities for future robotic missions to the Red Planet.
"We are looking to broaden participation in the exploration of Mars to include new models for government and commercial partnerships," said John Grunsfeld, associate administrator of NASA's Science Mission Directorate at the agency's headquarters in Washington. "Depending on the out [...]
Comet C/2013 UQ4 (Catalina) has been observed by NASA’s Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) spacecraft just one day after passing through its closest approach to the sun.
The comet glows brightly in infrared wavelengths, with a dust tail streaking more than 62,000 miles (100,000 kilometers) across the sky. Its spectacular activity is driven by the vaporization of ice that has been preserved from the time of planet formation 4.5 billion years ago.
NASA’s J [...]
The ISS Progress 56 resupply spacecraft, packed with almost three tons of cargo, automatically docked to the International Space Station’s Pirs docking compartment at 11:31 p.m. EDT Wednesday, less than six hours after its launch from the Baikonur Cosmodrome in Kazakhstan.
At the time of docking, the station was soaring 259 miles over the Pacific Ocean off the west coast of South America.
The Soyuz rocket carrying Progress 56 launched from Baikonur at 5:44 p.m. (3:44 a.m., Baikonur time) [...]
This alluring all-skyscape was taken 5,100 meters above sea level, from the Chajnantor Plateau in the Chilean Andes. Viewed through the site's rarefied atmosphere at about 50% sea level pressure, the gorgeous Milky Way stretches through the scene. Its cosmic rifts of dust, stars, and nebulae are joined by Venus, a brilliant morning star immersed in a strong band of predawn Zodiacal light.
Still not completely dark even at this high altitude, the night sky's greenish cast is due to airglow emi [...]
Following last week's successful launch of six ORBCOMM satellites, the Falcon 9 rocket’s first stage reentered Earth’s atmosphere and soft landed in the Atlantic Ocean. This test confirms that the Falcon 9 booster is able consistently to reenter from space at hypersonic velocity, restart main engines twice, deploy landing legs and touch down at near zero velocity.
After landing, the vehicle tipped sideways as planned to its final water safing state in a nearly horizontal position. The wat [...]
The Expedition 40 crew of the International Space Station is working through a packed agenda of science Wednesday and preparing for the late-night arrival of a Russian cargo craft set to launch in the afternoon. The station also conducted a “deboost” Wednesday morning to steer clear of some space debris.
The engines of the station’s Zvezda service module conducted a 32-second firing at 6:57 a.m. EDT to slightly lower the orbit of the complex and steer clear of a fragment of debris from [...]
3C58 is the remnant of a supernova observed in the year 1181 AD by Chinese and Japanese astronomers. This new Chandra image shows the center of 3C58, which contains a rapidly spinning neutron star surrounded by a thick ring, or torus, of X-ray emission.
The pulsar also has produced jets of X-rays blasting away from it to both the left and right, and extending trillions of miles. These jets are responsible for creating the elaborate web of loops and swirls revealed in the X-ray data. These fe [...]
Thanks to NASA's Kepler and Spitzer Space Telescopes, scientists have made the most precise measurement ever of the radius of a planet outside our solar system. The size of the exoplanet, dubbed Kepler-93b, is now known to an uncertainty of just 74 miles (119 kilometers) on either side of the planetary body.
The findings confirm Kepler-93b as a "super-Earth" that is about one-and-a-half times the size of our planet. Although super-Earths are common in the galaxy, none exist in our solar syste [...]
A paper recently published in the journal Geophysical Research Letters describes an alternate model for the interaction between the heliosphere -- a “bubble” around our planets and sun -- and the interstellar medium. It also proposes a test for whether Voyager 1 has, indeed, left the heliosphere.
NASA's Voyager project scientist, Ed Stone of the California Institute of Technology in Pasadena, responds:
“It is the nature of the scientific process that alternative theories are deve [...]