Sunday: July 8, 2001  0541 GMT
NASA, Boeing dispute major TDRS problem
NASA's new $200-million Boeing Satellite Systems TDRS-H tracking and data relay satellite has malfunctioned in geosynchronous orbit. As a result, upgrades to the critical TDRS relay constellation are being delayed and, to date, NASA has refused to take ownership of the platform from the contractor.
ILS beats Ariane, Boeing on first EELV
International Launch Services and Eutelsat are completing arrangements for the launch of a European Eutelsat spacecraft on the first flight of the Lockheed Martin Atlas V in May 2002.
Saturday: July 7, 2001  0308 GMT
Chandra views Vela pulsar
In this wide-angle view, the Vela pulsar and its pulsar wind nebula are seen against a background of clouds, or filaments, of multi-million degree Celsius gas. These clouds are part of a huge sphere of hot expanding gas produced by the supernova explosion associated with the creation of the Vela pulsar about 10,000 years ago.
System would harness GPS to study environment
Engineers at Purdue University and NASA have developed a new technique for monitoring the environment by using routine signals that already are being beamed to Earth by global positioning systems.
Friday: July 6, 2001  0221 GMT
Our galaxy's sister is a cannibal, astronomers say
The large spiral galaxy called Andromeda is devouring a couple of small neighbouring dwarf galaxies, astronomers report. The evidence of galactic dismemberment is a stream of stars on the outskirts of Andromeda that appears to have been stripped from two dwarf galaxies by their larger companion.
First space station plants, seeds headed to Earth
The Expedition Two crew continued to prepare the first plants and seeds produced on the International Space Station for their return trip on shuttle Atlantis set to visit the orbiting laboratory next week. The plants are the first to successfully go through germination, growth and seed development aboard the station.
Sounds of a star
Sound waves running through a star can help astronomers reveal its inner properties. In the case of our Sun, such waves have greatly improved our knowledge about what is going on inside. However, because they are much fainter, it has turned out to be very difficult to detect similar waves in other stars. But now waves have been detected in a solar-twin star.
DAILY BRIEFING  Other stories making news today
How fast does the world turn? -- A discovery that may someday help measure how clouds and earthquakes change Earth's rotation has come from an experiment that made friction-free helium whistle.
Thursday: July 5, 2001  1500 GMT
Hubble captures best view of Mars obtained from Earth
Frosty white water ice clouds and swirling orange dust storms above a vivid rusty landscape reveal Mars as a dynamic planet in this sharpest view ever obtained by an Earth-based telescope.
Rapid heartbeat in Andromeda yields discovery
There are many kinds of celestial objects in the Universe but we are far from knowing them all. XMM-Newton may have discovered a new one: a very luminous soft X-ray source that is pulsating extremely rapidly in the central region of the Andromeda galaxy. This unusual object could be a new kind of accreting white dwarf.
'Star Wars' cryo tank gets new life with NASA
A multi-million-dollar cryogenic chamber, erected as part of Air Force research for President Reagan's 1980s Strategic Defense Initiative, will soon be helping NASA develop space science capabilities for the 21st century.
Cryo tank
Wednesday: July 4, 2001  0414 GMT
Eating right for long-duration space missions
A study released of astronauts who lived aboard the Russian space station Mir, and counterparts living in seclusion on Earth, has validated a tool for measuring astronauts' dietary intake during long space flights.
NASA names crew to STS-111 space station mission
NASA has named three astronauts to the crew of space shuttle mission STS-111, scheduled to launch in 2002 to deliver a new International Space Station resident crew and a Canadian-built mobile base for the orbiting outpost's robotic arm. STS-111 is also the second space shuttle mission dedicated to delivering research equipment to the space platform.
Eutelsat sets new course as a private company
The assets and activities of the European Telecommunications Satellite intergovernmental organization were transferred on July 2 into Eutelsat S.A., a limited liability company headquartered in Paris. This establishes Eutelsat on a level playing field for furthering its expansion in the global telecommunications market.
Tuesday: July 3, 2001  0250 GMT
Astronomers discover giant Kuiper Belt object
Astronomers announced Monday that they have discovered an object in the distant Kuiper Belt that could rival Pluto's moon in size. The discovery of is more ammunition in the debate regarding the classification of Pluto, the smallest and most distant planet.
Shuttle launch pads filled for summer station missions
For the first time in 18 months both space shuttle launch pads at Kennedy Space Center are occupied following Monday's rollout of Discovery in preparation for blastoff in August on a mission to exchange the resident crew aboard the international space station. Discovery joins sistership Atlantis, which was rolled out June 21.
Shuttle pads
Mars-bound probe adjusts its trajectory
NASA's 2001 Mars Odyssey spacecraft fine-tuned its flight path on Monday for arrival at Mars in October as it performed its second trajectory correction maneuver, changing its velocity by about two miles per hour.
Brown dwarfs are stellar embryos evicted by siblings
Brown dwarfs, essentially stunted stars, were most likely ejected from newborn, multiple-star systems before they had a chance to accumulate enough mass to ignite the hydrogen in their interiors and flower, according to a new study.
Brown dwarf
DAILY BRIEFING  Other stories making news today
Galileo in quiet cruise mode -- This holiday week sees the Galileo spacecraft continue its normal cruise activities. On Thursday, a standard test of the on-board gyroscopes is performed. Due to repeated dosages of the intense radiation near Jupiter, some of the electronic components used to report data from the gyros have degraded. These periodic tests check the current health of the electronics, and also determine if updates are needed to software parameters.
Monday: July 2, 2001  0001 GMT
Orbital anomaly may have caused global Earth cooling
A rare coincidence of orbital cycles may have caused sudden global cooling 23 million years ago, according to scientists, who used high resolution records and new techniques that allow astronomical calibration to be extended much further back in time.
Giant 'eyeball' furthers mega-telescope concept
A satellite receiver that works like a giant eyeball has arrived in Sydney for testing, bringing a step closer one idea for the world's next 'mega-telescope' -- an army of giant spheres to collect radio waves from the cosmos, dotted in patches across the landscape.

Earlier news
June 25-July 1: MAP launched to measure afterglow of the Big Bang; Hints of planet-sized drifters bewilder scientists; Satellite images tell tale of Wisconsin tornado.

June 18-24: Atlas launches foundation of ICO satellite system; Temperature map of Io presents a puzzle; Pegasus launch of HESSI postponed indefinitely; Atlantis rolled to launch pad; Grounded military weather satellite finally repaired.

June 11-17: Robot arm bumps into station, but passes key test; Evidence found for recent shallow ground ice on Mars; Jupiter's aurorae, volcanic eruptions on Io revealed; Proton adds new craft to ASTRA satellite system.

June 4-10: Search begins for cause of X-43A launch malfunction; Shuttle launch delayed amid station arm mystery; Saturn's changing seasons; Ariane 4 rocket launches new era for Intelsat.

More news  See our weekly archive of space news.

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