... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. August 12, 1997 . Sher 25: A Pending Supernova? ... Sher 25, designated by the arrow, is a blue supergiant star located just outside the open star cluster and ionized region named NGC 3603. Sher 25 lies in the center of an hourglass shaped nebula much like the one that surrounds the last bright supernova visible from Earth: SN1987a . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 January 3 . Cas A Supernova Remnant in X-Rays . ... Explanation: The complex shell of a star seen to explode 300 years ago is helping astronomers to understand how that star exploded. The above recently released image of supernova remnant Cassiopeia A (Cas A) shows unprecedented detail in three X-ray colors. ... About APOD > . ...

Supernova 2000de in NGC 4384 . This page is devoted to information on Supernova 2000de in NGC 4384 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the Supernova links web page. Marco Migliardi of CROSS discovered this one. He first sent it out as a "possible" to the ISN group on August 12.8. ... CROSS 2000de page . ... CROSS image . ...

. Prague, August 16, 2006 . Present classification : Suggested: SR, SRA, SRB, SRC, SRS SR (the regularity level should be indicated by the presentation of the light elements; if a star is a supergiant, it will be obvious from its spectral type) SRD SRd (we feel not inclined to introduce the UU Her type) ZZ, ZZA, ZZB, ZZO ZZ (subtype is contained in the spectral type) . BLBOO BLBoo . GDOR GDor . PULSATING VARIABLES (CONTINUED)

Name Last modified Size Description . Parent Directory 28-Dec-2015 15:33 - 5721-t1.txt 18-Sep-2006 16:51 127k 5721-t3.txt 10-Aug-2006 17:02 180k 5721-t4.txt 25-Sep-2006 18:54 187k IBVS 5721 (8 August ..> 18-Sep-2006 16:56 182k e1.txt 14-Jul-2006 13:58 180k e2.txt 04-Aug-2006 14:59 187k nl78.tex 03-Aug-2006 10:22 197k .

... Отмеченная наградами АстроТоп-а . ... 1) К участию в конкурсе допускаются все российские сайты на тему астрономии и космонавтики, и все русскоязычные сайты за пределами России. ... II) Сайт года . ... Победитель: Астронет - http://www.astronet.ru/ : подано голосов экспертов - 109 (всего - 129) . ... 3-е место разделили: Астрономия и Телескопостроение - http://www.astronomer.ru/ и Лента новостей космонавтики от Железнякова - http://www.cosmoworld.ru/spaceencyclopedia/hotnews/ : подано по 37 голосов; ...

... Here is a brief outline of the current theory of the events in the early history of the solar system: . A cloud of interstellar gas and/or dust (the "solar nebula") is disturbed and collapses under its own gravity. ... The gas cools off enough for the metal, rock and (far enough from the forming star) ice to condense out into tiny particles. (i.e. some of the gas turns back into dust). ... Once the larger of these particles get big enough to have a nontrivial gravity, their growth accelerates. ...