... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

... SN 1006: A Supernova Ribbon from Hubble . ... Back in the year 1006 AD, light reached Earth from a stellar explosion in the constellation of the Wolf ( Lupus ), creating a "guest star" in the sky that appeared brighter than Venus and lasted for over two years. The supernova, now cataloged at SN 1006 , occurred about 7,000 light years away and has left a large remnant that continues to expand and fade today. ... Publications with keywords: SN 1006 - supernova remnant . ... Vela Supernova Remnant . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

... Cosmic Dawn: Early Results from the Hubble Ultra Deep Field Science Writers' Workshop September 23 2004 . ... Hubble Heritage Project . ... Hubble Fellowships . Science Blog . ... Cosmic Dawn: Early Results from the Hubble Ultra Deep Field Science Writer's Workshop . ... Archive of entire press workshop . ... Cosmic Dawn: Early Results from the Hubble Ultra Deep Field . ...

... 2007 September 10 . Building Galaxies in the Early Universe . Credit: NASA , ESA , and N. Pirzkal ( STScI / ESA ) et al. ... A recent analysis of the HUDF focused on the smallest, faintest and most compact galaxies imaged. These small galaxies are thought to be the building blocks of modern galaxies . ... Part of the HUDF is shown above , while one blue building-block galaxy, highly redshifted by the universe so as to appear more yellow, is shown in the upper left inset. ... About APOD | ...

... STScI-PF95-13 FOR RELEASE: April 10, 1995 OXYGEN-RICH SUPERNOVA REMNANT IN THE LARGE MAGELLANIC CLOUD This is a NASA Hubble Space Telescope image of the tattered debris of a star that exploded 3,000 years ago as a supernova. ... A Hubble Wide Field Planetary Camera 2 image of the inner regions of the supernova remnant shows the complex collisions that take place as fast moving ejecta slam into cool, dense interstellar clouds. ... The image shows a region of the remnant 50 light-years across. ...

... Tonight's Sky . ... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Observing . ... Why Join? ... Jupiter joins Venus in the early evening . ... That more brilliant one is Venus, and it s currently having its best showing for northern observers of 2015 as it shines brightest and appears highest in the evening sky. ... Only the Full Moon itself climbing higher in the southeastern sky this evening appears brighter. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

First Mid Term Date has Changed . Classes on Friday . ... Second Midterm Date is Changed to May 29 . ... Local Astronomy Stuff . ... Excellent Overview of the Early Universe . ... First Midterm Results . First Midterm Answers . Second Midterm Results . Second Midterm Answers . ... Study Guide for the First Midterm . Study Guide for the Second Midterm . ... WEEK 1: ANCIENT COSMOLOGY . ... The Universe in the first 0.01 -0.1 seconds . The Universe in the first 0.1 -1 second . ...

... Science . ... Science Users Information > Science Publications > Science Announcements > ALMA Early Science Cycles 1 and 2 Timelines . ... Published: 28 Jun 2013 . Cycle 1 Early Science observing resumed at nominal priority in June 2013 after development work on the array and infrastructure. ... The call for Cycle 2 Early Science proposals will appear in October 2013 with a deadline for proposal submission in December 2013. Cycle 2 Early Science observations are expected to start in June 2014. ...

... The ancient chronical said about the colour rings around the Sun and the Moon, about three suns in the sky, light columns, bright lightning, different "comets" rushing to the Earth, moving among the stars or round the Earth with the sky. All these occurrences may be divided into three categories: one that occur in the near or far space, processes going on in the Earth atmosphere under the influence of cosmic factors and at last the occurrences connected with the Earth atmosphere. ... Rainbow . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... A young star flees the nest (Image credit: NASA, ESA, ESO et al) . Astronomers in search of really, really big stars look to the Tarantula Nebula. ... This star would fit in perfectly with the stars of the nebula, specially those in the central star cluster, called R136, but it is some 375 light years away. ... This orphaned star will live as fast as it is moving, eventually exploding. ...

Aristarchus of Samos, around 200 BC, proposed that the Earth revolved around the Sun, but found few supporters. ... For a discussion of the discovery of the solar system which includes a "moving picture" illustrating retrograde motion, click here . ... The Sun and Moon, he claimed, obviously moved around Earth. ... The full story of the discovery of the solar system--of Copernicus, Galileo, Tycho and Kepler--is long and would take this discussion too far afield. ... Nicolaus Copernicus . ...

... David P. Stern Laboratory for Extraterrestrial Physics NASA . ... Alfv?n's Theory and Electric Fields . ... The debate between proponents of a static corona, Parker's solar wind theory, and an alternative "solar breeze" theory of Chamberlai n [1960, 1961; Dessler 1967] was only settled by observations from space. ... Rapidly spreading plasma clouds produced by solar flares, like those envisioned by Chapman and Ferraro, are sometimes superposed on the solar wind flow. ...

... ATNF Home . About ATNF . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . Mopra radio telescope . ... Scientific support of facilities . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... Primordial theory review : Dick Bond . Defects and the CMB review : Andy Albrecht . ... Gravitational wave contribution to CMB anisotropies : V.B. Lukash and E.V. Mikheeva . C_l from cosmic strings : Lloyd Knox . Some aspects of CMB anisotropies induced from topological defects : Mairi Sakellariadou . ... CMB anisotropies from scaling sources : Ruth Durrer . ... SZ observations I : Sarah Church . ... Holes in the microwave sky? ... Detecting cosmic strings in the CMB : James Robinson . ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . SUPERNOVA 1987a . This Hubble Space Telescope image shows the remnant of a supernova a star that blew itself to pieces. We first saw the light of the explosion on Earth in 1987, and this image was taken in 1994. The remnant of the explosion itself is the blob of stuff in the center; the rings are regions of material ejected by the star earlier in its death throes. ... Return to An Ancient Universe . ...

... I've been to Alaska to see them almost every spring since 1996. ... My hobby turns to be my work. ... I was singing in a rock band when I was a student. I love 70's western rock music (e.g., AEROSMITH, ROLLING STONES, QUEEN,...) and 80's Japanese rock music (ARB, ECHOES, Carmen Maki Oz,.. My most favorite band is LA-PISSCH , which is a Japanese funky rock band and plays a kind of mixture music (like FISHBONE) including ska, punk. hard rock, blues.. ... Now I'm tring to see Japanese movies. ...

Astronomy Discussion Forums . ... Atm ž Astrophotography ž Blackholes ž Blackholes2 ž CCD ž Celestron ž Domes ž Education . ... New Model: How Do The Sun And Moon Appear To Move Across The Sky . ... Post Message | ... focused on the Sun and the Moon as they appear from the given location of the Earth surface: . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Astronomy suffers from the `Static Illusion' - because astronomical changes usually occur over intervals much longer than a human lifetime they appear static. This illusion affects our understanding of how astronomical objects work. ... Observations at the 1/10th arcsecond level with HST and near-infrared adaptive optics on ground based telescopes are beginning to create movies of `astronomy in motion'. ... Proto-star HH-30 expanding jet HST.. Young binary, XZ Tau, expanding `bubbles' HST.. ...

... 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. ...