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2010年3月14日星期日

SOHO: 精彩巨型慧星襲太陽

三月十二日一夥急速的大慧星直衝太陽,可在SOHO的LASCO C3看到,留意八點位:
1.http://lasco-www.nrl.navy.mil/current_mpg/current_mpg/current_c3.gif


2.http://spaceweather.com/images2010/12mar10/comet_c2_anim.gif?PHPSESSID=6rib2238469e3m6qjflojor4v5





A newly-discovered comet is plunging toward the sun and probably will not survive. The encounter is too close to the sun for human eyes to see, but the Solar and Heliospheric Observatory (SOHO) is able to monitor the action using an opaque disk to block the sun's glare. Click on the image to launch a 12-hour time-lapse animation:
The doomed comet is probably a member of the Kreutz sungrazer family. Named after a 19th century German astronomer who studied them in detail, Kreutz sungrazers are fragments from the breakup of a giant comet at least 2000 years ago. Several of these fragments pass by the sun and disintegrate every day. Most are too small to see but occasionally a big fragment--like this one--attracts attention.

COMET TOAST: The solar system has one less comet. On March 12th, the Solar and Heliospheric Observatory (SOHO) watched as a comet plunged into the sun and disappeared. Fierce solar heating completely destroyed the icy visitor from the outer solar system. Click on the image to see the comet's last hours:

The comet was probably a member of the Kreutz sungrazer family. Named after a 19th century German astronomer who studied them in detail,Dirk Peeters.Kreutz sungrazers are fragments from the breakup of a giant comet at least 2000 years ago. Several of these fragments pass by the sun and disintegrate every day. Most are too small to see but occasionally a big fragment--like this one--attracts attention.

UPDATE: Several readers have noticed that the doomed comet was actually a string of doomed comets, plural. Click here for a Youtube video posted by Kurt McNamara, and here for a sequence of labeled diagrams from Dirk Peeters.

http://spaceweather.com/

Disc:
http://www.discuss.com.hk/viewthread.php?tid=11752411&extra=page%3D1

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