... 2004 February 5 . NGC 1569: Starburst in a Small Galaxy . Credit: ESA , NASA , P. Anders ( GЖttingen Univ. ) et al. Explanation: Grand spiral galaxies often seem to get all the glory, flaunting their young, bright, blue star clusters in beautiful, symmetric spiral arms. But small, irregular galaxies form stars too. In fact, as pictured here , dwarf galaxy NGC 1569 is apparently undergoing a burst of star forming activity, thought to have begun over 25 million years ago. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. February 9, 1999 . A Supernova Star-Field . Credit: Hubble Heritage Team ( AURA / STScI / NASA ) . Explanation: Bright stars don't last forever. ... The above picture is a composite of recent images taken over several years. The explosion originated from a bright massive star that ran out of nuclear fuel . ... About APOD > . ...

. Please standby and you will be automatically connected to the new location of the unframed Supernova page. Or, click on the link above. If you have questions or problems, please email me at David Bishop dbishop@vhdl.org . Last modified: Mon Aug 27 12:40:15 EDT 2001

... General Catalog of Variable Stars (GCVS database, Version 2015Sep) . ... Query forms . ... Enter The Type of the Variability : ACV ACV+ DSCT : ACV+ DSCTC ACV: ACVO ACVO: ACYG ACYG: AM AM/XRM+E AM: BCEP BCEP (B) BCEP +E BCEP +E: BCEP +EA/D BCEP + ELL : BCEP : BCEPS BE BE+ BCEP : BE: BLBOO BLLAC BY BY+UV BY+UV: BY: BY:+E: BY:+UV: CEP CEP(B) CEP: CST CST: CW CW: CWA CWA: CWB CWB: DCEP DCEP(B) DCEP: DCEPS DCEPS(B) DCEPS: DSCT DSCT (B) DSCT (B:) DSCT : DSCTC DSCTC (B) DSCTC +E DSCTC +E...

... 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. ...