... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. October 6, 1998 . Comet Williams in 1998 . ... Explanation: The brightest comet in the sky right now is Comet Williams . Moving slowly though the constellation of Centaurus , Comet Williams, at magnitude 8, is visible to Southern Hemisphere observers with binoculars. ... Comet Williams was discovered in early August by Peter Williams. ...

... September 25, 1997 . T Pyxidis: Recurrent Nova . ... Explanation: What happens when a thermonuclear blast occurs on the surface of a white dwarf star? ... Like other binary star systems which produce nova outbursts , T Pyx is composed of a dense white dwarf and a close companion star. An outburst occurs when the temperature and density of the sea of matter dumped from the companion onto the surface of the white dwarf reach the nuclear flash point for hydrogen . ... About APOD > . ...

Supernova 2009an in NGC 4332 . This page is devoted to information on Supernova 2009an in NGC 4332 . Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . ... This supernova is in the Constellation Draco . ... SNWeb has a 2009an page . ... 2009/02/26.06 . ... 2009/02/28.416 . ... 2009/02/28.583 . ... 2009/03/01.281 . ... 2009/03/02.164 . ... 2009/03/02.275 . ... 2009/03/03.608 . ... JM Llapasset . ... 14.9 . ... Joel Nicolas . ...

GCVS Research Group: . Recent publications . Kazarovets E.V., Samus N.N., Durlevich O.V., Kireeva N.N., Pastukhova E.N., The 81st Name-List of Variable Stars. ... Kazarovets E.V., Samus N.N., Durlevich O.V., Kireeva N.N., Pastukhova E.N., The 80th Name-List of Variable Stars. ... Samus N.N., Kazarovets E.V., Kireeva N.N., Pastukhova E.N., Durlevich O.V. General Catalogue of Variable Stars: Current status and new Name-lists Odessa Astronomical Publications, 2010, V. 23, p. 102-105. ...

IBVS 5422-t3.txt #IBVSdataKey: other 001. ... T. Kato, vsnet-newvar, 2000-2001 (http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-newvar/maillist.html). ... IAU Circ No. ... K. Haseda, IAU Circ No. 7808, 2002. 131. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/hadv105.html. ... V. Tabur, IAU Circ No. 8001, 2002. 135. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/nsgr02-4.html. ... K. Haseda, IAU Circ No. 7647, 2001. 137. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/nsco01.html. ...