Supernova 2009js in NGC 918 . This page is devoted to information on Supernova 2009js in NGC 918 . 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 updates and links web pages. Discovered independently by Lick Observatory Supernova Search (USA) and Koichi Itagaki (Japan). ... 2009/10/11.44 . 17.2 . ... Joseph Brimacombe . ...

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• Supernova 2009ip in NGC 7259
• Historical Supernova Boneyard
• Supernova 2003fa in MCG +7-36-33

... 2013 September 9 . Nearby Cepheid Variable RS Pup . Image Credit: Hubble Legacy Archive , NASA , ESA - Processing: Stephen Byrne . ... Pulsating RS Puppis , the brightest star in the image center, is some ten times more massive than our Sun and on average 15,000 times more luminous. In fact, RS Pup is a Cepheid type variable star , a class of stars whose brightness is used to estimate distances to nearby galaxies as one of the first steps in establishing the cosmic distance scale. ...

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• APOD: October 20, 1999 - NGC 2261: Hubbles Variable Nebula
• APOD: 2013 August 26 - Bright Planetary Nebula NGC 7027 from Hubble
• APOD: 2007 May 29 - Bright Spiral Galaxy M81 from Hubble

... the Hubble Heritage Team ( AURA / STScI / NASA ) Explanation: What causes Hubble's Variable Nebula to vary? ... Hubble's Variable Nebula is a reflection nebula made of gas and fine dust fanning out from the star R Monocerotis. ... A leading variability explanation for Hubble's Variable Nebula holds that dense knots of opaque dust pass close to R Mon and cast moving shadows onto the reflecting dust seen in the rest of the nebula. ... NGC 7129 and NGC 7142 . ... vdB 152: Reflection Nebula in Cepheus ....

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• Астронет > NGC 2261: Hubbles Variable Nebula
• Bright Planetary Nebula NGC 7027 from Hubble
• Nearby Cepheid Variable RS Pup

In autumn 1994, two groups of astronomers announced that they had discovered Cepheid variable stars in a distant cluster of galaxies. ... As the term suggests, variable stars change in brightness over time. ... Variable stars are an ideal way to get high-school students doing real science, with real data, from the real sky. ... a sky chart to find the stars . ... Students can use the nearby stars to estimate the magnitude of Delta. ... Locate the star Delta in Cepheus and estimate its brightness . ...

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• ASP: A Taste of Real Astronomy ? The ESA/ESO Astronomy Exercises

... Two new LBV stars have been discovered in the Andromeda Galaxy. ... In Figure 1 the spectral energy distributions for six stars are shown: upper row - the newly discovered LBV stars, middle row - two well-known LBV stars Var A-1 and AE And, the lower row - two new B[e]-supergiant stars in Andromeda. ... Infrared spectra of the stars in the Andromeda Galaxy: two classical LBVs Var A-1 and AE And, two new LBVs J004526.62 and J004051.59, and two new B[e]-supergiants J004417.10 and J004444.52. ...

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• New Luminous Variable Star in M33
• New LBV Star Discovered in the Galaxy
• Detection of Radio Transients and Variable Radio Sources Using the Archive Data

... 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 > . ...

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• APOD: December 30, 1998 - Supernova 1994D and the Unexpected Universe
• APOD: 2000 March 12 - Supernova 1994D and the Unexpected Universe
• A SN at z~0.95 in the HDF

. 66%) of the extreme AGB stars are variable and only smaller fractions of carbon-rich (6.1%) and oxygen-rich (2.0%) stars are detected as variable sources. We also detect a population of variable young stellar object candidates. [ ADS ] . ADS Citation Query . # citations = 41 . citations vs. year [year,citations] . [2009,6][2010,6][2011,8][2012,4][2013,4][2014,4][2015,9] . Copyright 2012 Karl D. Gordon All Rights Reserved

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• A Search for Variable Stars based on the HST-Fine Guidance Sensor Photometry
• The MACHO Project LMC Variable Star Inventory. X. The R Coronae Borealis Stars
• STScI Preprint #1204

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• Low Surface Brightness Galaxy Gallery
• Astronomy Plus CCD Images of Galaxies
• The Galaxy Gallery: Messier Objects

... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

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• Supernova in the Cigar Galaxy | Astronotes
• Most distant galaxy ever seen | Astronotes
• The Blue Planet | Astronotes

... CEPHEID VARIABLE STARS: A Cepheid variable or Cepheid is a member of a particular class of very luminous, massive variable stars with pulsation periods of 1-70 days. ... The relationship is calibrated using data collected from Cepheids whose distances are determined by other means. ... Browse through the 68 CCD fits images he sent you, using ds9 and locate the Cepheid variable. ... Image credits: ESA - "http://sci.esa.int/science-e-media/img/20/cepheid-variables.jpg" . ...

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• Supernovae

... We have compared visualized fields of GSC and USNO A1.0 catalog with unpublished photographic finding charts that were sent by L. Plaut to the compilers of the GCVS. ... 7-15 A9 --- GCVS GCVS or NSV name 17-25 F9.4 --- GSC GSC number 26 A1 --- NoteFlag *Nonstar (GSC) flag 28-29 I2 h RA2000GSC.h Hours RA (GSC), equinox 2000.0 31-32 I2 min RA2000GSC.m Minutes RA (GSC), equinox 2000.0 34-38 F5.2 s RA2000GSC.s Seconds RA (GSC), equinox 2000.0 40 A1 --- DE2000GSC.- ... Plaut, L., 1966, Bull. ...

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• Future Prospects of Variable-Star Catalogues
• General Catalogue of Variable Stars: Vols I-III (the new electronic version).

... ESO, the European Southern Observatory . ... Trave