Astronomy Picture of the Day . Introducing Nova Velorum 1999 . 24.05.1999 . A bright nova was discovered Saturday that is currently visible to the unaided eye in southern skies. ... John U. Obs.), making it more luminous than many famous bright stars. The Keyhole Nebula . ... The dark dusty Keyhole Nebula gets its name from its unusual shape. Officially designated NGC 3324, the Keyhole Nebula is a smaller region superposed on the larger Eta Carina Nebula. ... Europe at Night . ...

... 2013 August 26 . Bright Planetary Nebula NGC 7027 from Hubble . Image Credit: Hubble Legacy Archive , ESA , NASA ; Processing: Delio Tolivia Cadrecha . ... Studying Hubble images of NGC 7027 have led to the understanding that it is a planetary nebula that began expanding about 600 years ago , and that the cloud of gas and dust is unusually massive as it appears to contain about three times the mass of our Sun. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... Tonight's Sky . ... The Magazine . ... Observing . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Bright planets meet at dusk . ... Astronomy magazine subscribers can read the full article for free. ... Get instant access to subscriber content on Astronomy.com! ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter....

LBV M33 varC in M33 . This page is devoted to information on Supernova M33varC in M33 . Basic information on this LBV, 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 links web page. ... This object, almost invisible for many years suddenly flared back to life in 2013. An LBV in outburst like this have been known flare into supernovae. ... 15.1 . ... Pedro Re' . ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

... STScI-PRC00-36 GHOSTLY REFLECTIONS IN THE PLEIADES NASA's Hubble Space Telescope has caught the eerie, wispy tendrils of a dark interstellar cloud being destroyed by the passage of one of the brightest stars in the Pleiades star cluster. ... In 1890, American astronomer E. E. Barnard, observing visually with the Lick Observatory 36-inch telescope in California, discovered an exceptionally bright nebulosity adjacent to the bright Pleiades star Merope. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... This image of the Tarantula Nebula comprises one of the largest mosaics ever assembled from Hubble photos and includes observations taken by HubbleтАЩs Wide Field Camera 3 and Advanced Camera for Surveys, combined with observations from the European Southern ObservatoryтАЩs MPG/ESO 2.2-metre telescope which trace the location of glowing hydrogen and oxygen. ... Subscribe to Astronotes . ...

... The Galactic low-mass X-ray binary GS 2023+338 was discovered during the burst on May 22, 1989 with the Japanise satellite Ginga (aka Galaxy). The flux reached 17 crabs (this unit of flux measurement is an bright X-ray source, Crab Nebula) at 10-35 keV. ... No other radio telescope worldwide carried out multi-frequency measurements. ... Upon 14 days the radio flux fell below the detection level at the RATAN-600 in relation to the decrease of the X-ray flux. ...

... ESO, the European Southern Observatory . ... ESO's Governing Bodies . ... ESO Acronyms . ... Galaxy Clusters . ... Video News Releases . ... New on eso.org . ... ESO News . ... View shopping cart . ... VISTA . ... On the right lies the globular star cluster UKS 1 and on the left lies a much less conspicuous new discovery, VVV CL001 тАФ a previously unknown globular, one of just 160 known globular clusters in the Milky Way at the time of writing. ... Milky Way : Star : Grouping : Cluster : Globular ....

... Comet Animation . ... Comet structures are diverse and very dynamic, but they all develop a surrounding cloud of diffuse material, called a coma, that usually grows in size and brightness as the comet approaches the Sun. ... As comets approach the Sun they develop enormous tails of luminous material that extend for millions of kilometers from the head, away from the Sun. ... The evaporated molecules boil off and carry small solid particles with them, forming the comet's coma of gas and dust. ...

... STScI-PRC95-45a CRUCIBLE OF CREATION: PANORAMIC HUBBLE MOSAIC ZOOMS IN ON MAELSTROM OF STAR BIRTH This spectacular color panorama of the center the Orion nebula is one of the largest pictures ever assembled from individual images taken with NASA's Hubble Space Telescope. ... Though this 2.5 light-years wide view is still a small portion of the entire nebula, it includes almost all of the light from the bright glowing clouds of gas and a star cluster associated with the nebula. ...

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 . ...

The HDF observations were carefully scheduled to minimize the effect of scattered light. Nevertheless, Scattered light from the bright earth produces a visible X pattern in about 25% of the HDF data frames. ... The filled-in portion of the histograms indicates data where the scatttered light patern is visible to the eye. ... A major difference between version 1 and version 2 of the data reduction was the treatment of scattered light. ... version 1 . ...

... The European HST Archive has been moved to ESA's European Space Astronomy Centre ( ESAC ), Spain, where most of ESA's Space Science Archives are located and operated from. ... The Space Telescope European Coordinating Facility (ST-ECF), jointly operated by ESA and the European Southern Observatory ( ESO ) was, until the end of 2010, the European HST science facility, supporting the European astronomy community in exploiting the research opportunities provided by the Hubble Space Telescope. ...

Supernovae are simply stars which explode. ... To understand supernovae, we need to understand stars. ... In this stage our Sun will swell up hundreds of times its current size, swallowing the Earth, and glowing hundreds of times brighter than it is now. ... Stars more than 10 times the mass of our sun have much more exciting lives. ... A Type II supernova to be precise. ... Since 1995 two teams have been discovering these objects: Our team, the High-Z SN Search, and the Supernova Cosmology Project. ...

Next: NGC 7552 Up: The Group of Nearby Previous: Circinus . is a barred spiral galaxy which is interacting with its brightest neighbour, NGC 6215, and possibly also with two newly discovered low-surface brightness galaxies (see Fig. ... Recent measurements with the ATCA 375-m array revealed an H I bridge between the two major galaxies and several extensions of the gas envelope of NGC 6221 which can be attributed to tidal forces between these galaxies (B. Koribalski et al., in prep.) ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... A bright nova has recently been discovered in the constellation of Delphinus (The Dolphin). ... The nova was confirmed late on August 14 at a magnitude of 6.3 (in a dark sky the faintest naked-eye stars are approximately 6.0 magnitudes - the lower the magnitude the brighter a star). ... Nova explosions occur in binary systems composed of a star similar to our Sun but only ~1/10 of its mass, and a star called a white dwarf. ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Accueil PlanУ?te de Fomalhaut : ALMA fait mentir Hubble . ... Le premier rУ?sultat scientifique de l'observatoire ALMA met en doute la dУ?couverte de la planУ?te Fomalhaut b par le tУ?lescope spatial Hubble. ... Т? En combinant les observations faites par ALMA de la forme du disque avec les modУ?les numУ?riques, nous sommes parvenus Уљ dУ?finir trУ?s prУ?cisУ?ment la masse et l'orbite de chacune des planУ?tes ТЛ, a dУ?clarУ? ...

... Soap Bubble Planetary Nebula and Crescent Nebula . ... Hubble Palette, 5 nm Narrowband filters, S-II (Red Channel): H-alpha (Green Channel): O-III (Blue Channel) - 30: 55: 40 minutes, 5 minute subframe, binned 1x1, Total= 125 minutes, Adobe Photoshop blue enhancement to highlight the nebula, Takahashi Epsilon-180, SBIG STL-6303E CCD camera, ATMoB Clubhouse, Westford, MA, 13 August 2010 . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

http://hubblesite.org/newscenter/archive/releases/1996/22/text/ Probing the mysterious heart of the Crab Nebula, the tattered remains of a stellar cataclysm witnessed more than 900 years ago, astronomers using NASA's Hubble Space Telescope have found that the Crab is even more dynamic than previously understood, based on a cosmic "movie" assembled from a series of Hubble observations. ... Because of this flickering, the neutron star is also called a "pulsar." ...