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SOHO watches a comet fading away

On Nov. 4, 2010, NASA's EPOXI spacecraft came within 450 miles of Comet Hartley 2, a small comet not even a mile in diameter, which takes about six and a half years to orbit the sun. Designated officially ...

Space & Earth / Space Exploration

created Jul 28, 2011 | popularity not rated yet | comments 0

Research shows 'BPA-free' bottles live up to manufacturers' claims

The alarm caused by bisphenol A (BPA) presence in reusable plastic bottles resulted in a recent industry change, producing products made with supposed BPA-free materials.

Chemistry / Materials Science

created Jul 11, 2011 | popularity 5 / 5 (1) | comments 0

At the heart of Hartley-2, a new breed of comet?

(PhysOrg.com) -- At the heart of every comet lies a remnant of the dawn of the solar system. Or is that remnants? Astronomers don't know, but the answer would give them a clearer picture of exactly how comets ...

Space & Earth / Space Exploration

created May 17, 2011 | popularity 5 / 5 (5) | comments 3 | with audio podcast

Researchers gain new insights into Comet Hartley 2

(PhysOrg.com) -- A tumbling comet nucleus with a changing rotational rate has been observed for the first time, according to a new paper by a Planetary Science Institute researcher.

Space & Earth / Space Exploration

created May 16, 2011 | popularity 4.7 / 5 (3) | comments 0 | with audio podcast

The unexpected action of bisphenol A on the inner ear of certain vertebrates

Bisphenol A, whose impact on reproduction and development is the subject of numerous studies, induces anomalies in the inner ear of embryos of certain vertebrates. This new, completely unsuspected effect has ...

Biology / Other

created Mar 16, 2011 | popularity 5 / 5 (2) | comments 0

New study links increased BPA exposure to reduced egg quality in women

A small-scale University of California, San Francisco-led study has identified the first evidence in humans that exposure to bisphenol A (BPA) may compromise the quality of a woman's eggs retrieved for in vitro fertilization ...

Medicine & Health / Health

created Dec 15, 2010 | popularity 5 / 5 (2) | comments 0 | with audio podcast

Terrifying pterosaurs were fragile in flight

Pterosaurs, the largest creatures ever to take to the skies, were adept fliers in a balmy breeze but would have crashed in stormy weather, according to a study published Wednesday.

Other Sciences / Archaeology & Fossils

created Nov 23, 2010 | popularity 3.7 / 5 (6) | comments 5

Website calculates effects of various asteroid impacts

If you're curious about how big an asteroid needs to be to cause major destruction, the new "Impact: Earth!" asteroid impact calculator can tell you.

Space & Earth / Space Exploration

created Nov 08, 2010 | popularity 5 / 5 (3) | comments 0 weblog

Video: Flight of the comet

(PhysOrg.com) -- This video clip was compiled from images taken by NASA's EPOXI mission spacecraft during its flyby of comet Hartley 2 on Nov. 4.

Space & Earth / Space Exploration

created Nov 08, 2010 | popularity 5 / 5 (6) | comments 0 | with audio podcast

NASA spacecraft on final approach toward comet

(PhysOrg.com) -- The EPOXI mission spacecraft has refined its path toward a Nov. 4 flyby of comet Hartley 2, successfully performing its final maneuver today at 8 a.m. PDT (11 a.m. EDT). The spacecraft burned ...

Space & Earth / Space Exploration

created Nov 02, 2010 | popularity 5 / 5 (5) | comments 0 | with audio podcast

Space radar provides taste of Comet Hartley 2

Exactly one week before the world gets a new look at comet Hartley 2 via NASA's EPOXI mission, observations of the comet by the Arecibo Planetary Radar in Puerto Rico have offered scientists a tantalizing pr ...

Space & Earth / Space Exploration

created Oct 29, 2010 | popularity 5 / 5 (5) | comments 0 | with audio podcast

Exposure to BPA associated with reduced semen quality

Increasing urine BPA (Bisphenol-A) level was significantly associated with decreased sperm concentration, decreased total sperm count, decreased sperm vitality and decreased sperm motility, according to a Kaiser Permanente ...

Medicine & Health / Health

created Oct 28, 2010 | popularity not rated yet | comments 0

Eight days left in comet flyby countdown

(PhysOrg.com) -- NASA's EPOXI mission continues to close in on its target, comet Hartley 2, at a rate of 12.5 kilometers (7.8 miles) per second. On Nov. 4 at about 10:01 a.m. EDT (7:01 a.m. PDT) the spacecraft ...

Space & Earth / Space Exploration

created Oct 27, 2010 | popularity 5 / 5 (1) | comments 0 | with audio podcast

NASA spacecraft hurtles toward active comet Hartley 2

NASA's Deep Impact/EPOXI spacecraft is hurtling toward Comet Hartley 2 for a breathtaking 435-mile flyby on Nov. 4th. Mission scientists say all systems are go for a close encounter with one of the smallest ...

Space & Earth / Space Exploration

created Oct 18, 2010 | popularity 4.6 / 5 (8) | comments 0 | with audio podcast

WISE captures key image of comet mission's destination

NASA's Wide-field Infrared Survey Explorer, or WISE, caught a glimpse of the comet that the agency's EPOXI mission will visit in November. The WISE observation will help the EPOXI team put together a large-scale ...

Space & Earth / Space Exploration

created Oct 06, 2010 | popularity 5 / 5 (2) | comments 0

EPOXI

EPOXI is a NASA unmanned space mission led by the University of Maryland using the existing Deep Impact vehicle to begin a new series of observations. It first investigated extrasolar planets and, on November 4, 2010, it performed a close approach to the comet 103P/Hartley (alternately named Hartley 2). The new mission was originally announced on 3 July 2007 as including flyby of comet 85P/Boethin, but Boethin was too small and faint for its orbit to be calculated accurately, so the mission was subsequently retargeted for a 103P/Hartley flyby. NASA and the University of Maryland confirmed funding for the 103P/Hartley flyby in news releases issued on December 13, 2007.

EPOXI combines two targets: the Deep Impact Extended Investigation (DIXI), and the Extrasolar Planet Observation and Characterization (EPOCh). Deep Impact will conduct both missions, the Extrasolar Planet Observation and Characterization during the cruise phase to 103P/Hartley, and the Deep Impact Extended Investigation at flyby. The spacecraft was also used as a test platform for a delay-tolerant networking transmission while at a distance of 20 million miles from Earth.

As of November 2011, there will be a senior review of all operating planetary exploration missions at NASA. That will likely include a review of the status of the Deep Impact Flyby spacecraft to determine whether an additional extended mission should be approved. Decisions will not occur until early 2012.

NASA's Jet Propulsion Laboratory, in Pasadena, California., manages EPOXI for NASA's Science Mission Directorate, Washington. The Principal Investigator is Michael A'Hearn.

For more information about EPOXI, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.

Related topics: comet