空天科学类最新20条新闻
空天科学类最新新闻
"Contrary to popular belief, the low-earth orbit spacecraft environment is a hostile one where energetic atoms, ions, electrons, and radiation bombard the surfaces of a satellite"
When the space shuttle Endeavour launched today it carried with it a set of experiments designed and constructed in the laboratory of Dennis Jacobs, a University of Notre Dame professor of chemistry and ...via Huliq.com
"For this specific planet we observed, methane cannot be produced biologically"
By Will Dunham
WASHINGTON (Reuters) - An organic molecule has been spotted for the first time in the atmosphere of a planet outside our solar system, a key step toward possibly finding signs of life on a distant world, scientists said.
Astronomers using the Hubble Space Telescope found methane in the atmosphere of a planet called HD 189733b, which is about the size of Jupiter and is 63 light-years from Earth, they said in research published on Wednesday in the journal Nature.
Organic molecules contain carbon-hydrogen bonds and can be found in living things. Methane, for instance, is found in natural gas and cattle belches.Read more
Based on Cassini radar observations of Titan's surface the moon's spin rate is now confirmed to be both non-synchronous and changing, providing evidence for the existence of a subsurface ocean.
"It blows away every gamma ray burst we've seen so far."
A gamma ray burst of historic proportions has been observed by scientists working with the U.S. space agency's Swift satellite.via Daily India
The crews' morning off started at 11:28 a.m., when their wake up call came in the form of the Newsboys song, "I am Free." The song was played for Mission Specialist Mike Foreman and performed by the Praise Team ...via Aero-News Network
5& 6 June 2008 Salle Miramar, La Croisette, Cannes, France Croisette Beach Hotel 13, rue du Canada, 06400 Cannes, France
"And we have lots of margins in the schedule to fly all the missions that we have planned between now and then, so we're not worried about that."
Could a NASA be considering a delay in a flight to service the Hubble Space Telescope? There could be an issue with a new external fuel tank.via WDBO-AM Orlando
"Never been called that before."
An American spacewalker squirted pink 'goo' from a high-tech caulk gun Thursday to test a heat-shield repair technique that one day could save astronauts from a Columbia-type disaster.via News Press
"When one considers ... just how few actual objects have been off-planet, it's amazing to think that any of us would have the opportunity to actually own one of these incredibly rare pieces"
The space suit patches from Buzz Aldrin's Gemini 12 space suit, presented by the astronaut to his parents as a Christmas gift in 1966, are estimated to sell for as much as $75,000 at a public auction Tuesday.via WFAA-TV Dallas
For Clarke, space held the answers March 21, 2008 John P. Cleary The year 2001 has come and gone, and we're not living on the moon or sending men to explore the moons of Jupiter.via Star-Gazette.COM
For reasons not fully understood by scientists, the weeks around the vernal equinox are prone to Northern Lights.
Two nights ago, astronomers observed a cosmic explosion so intense it was visible to the naked eye from a distance of 7.5 billion light years.
The explosion of a star halfway across the universe was so huge it set a record for the most distant object that could be seen on Earth by the naked eye.
The NASA/ESA Hubble Space Telescope has made the first detection ever of an organic molecule in the atmosphere of a planet orbiting another star. This breakthrough is an important step in eventually identifying signs of life on a planet outside our Solar System. Hubble found the tell-tale signature of methane in the atmosphere of the Jupiter-sized extrasolar planet HD 189733b. Under the right circumstances, methane can play a key role in prebiotic chemistry - the chemical reactions considered necessary to form life as we know it. Although methane has been detected on most of the planets in our Solar System, this is the first time any organic molecule has been detected on a world orbiting another star. - European Space AgencySpace and Astronautics News
A powerful gamma ray burst detected March 19th by NASA's Swift satellite has shattered the record for the most distant object that could be seen with the naked eye. Swift's Burst Alert Telescope picked up the burst at 06:12 UT on March 19, 2008, and pinpointed the coordinates in the constellation Bootes. Telescopes in space and on the ground quickly moved to observe the afterglow. The burst was named GRB 080319B and registered between 5 and 6 on the visual magnitude scale used by astronomers. (A magnitude 6 star is the dimmest visible to the human eye; magnitude 5 is almost three times brighter.)Space and Astronautics News
Using data from the SCIAMACHY instrument aboard ESA's Envisat environmental satellite, scientists have for the first time detected regionally elevated atmospheric carbon dioxide - the most important greenhouse gas that contributes to global warming - originating from manmade emissions. - European Space AgencySpace and Astronautics News
Jules Verne ATV has today reached a parking position 2000 km ahead of the International Space Station. Europe's ISS re-supply spacecraft will wait at this holding point for the completion of the STS-123 Space Shuttle mission before proceeding with the first of two rendezvous demonstration days.
Scientists using a Mars-orbiting camera have discovered the first evidence for deposits of chloride minerals -- salts -- in numerous places on Mars. These deposits, say the scientists, show where water was once abundant and may also provide evidence for the existence of former Martian life.
Final results from the University of Utah's High Resolution Fly's Eye cosmic ray observatory show that the most energetic particles in the universe rarely reach Earth at full strength because they come from great distances, so most of them collide with radiation left over from the birth of the universe. The findings confirm a 42-year-old prediction -- known as the Greisen-Zatsepin-Kuzmin "cutoff," "limit" or "suppression" -- about ultrahigh-energy cosmic rays.
NASA's Cassini spacecraft has discovered evidence that points to the existence of an underground ocean of water and ammonia on Saturn's moon Titan. The findings made using radar measurements of Titan's rotation will appear in the March 21 issue of the journal Science.