... 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 . ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... A Flock of Stars . ... Only a few stars can be found within ten light-years of our lonely Sun, situated near an outer spiral arm of the Milky Way galaxy. But if the Sun were found within one of our galaxy's star clusters, thousands of stars might occupy a similar space. ... NGC 1316: After Galaxies Collide . ... Their investigation indicates that NGC 1316 is an enormous elliptical galaxy that started, about 100 million years ago, to devour a smaller spiral galaxy neighbor, NGC 1317, just above it. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2007 October 16 . SN 2005ap: The Brightest Supernova Yet Found . ... Specific colors emitted during SN 2005ap indicate that it was a Type II supernova , a breed of stellar explosion that results when a high mass star begins fusing heavy elements in or near its core. ... About APOD | ...

Welcome to the Starburst and Galaxy Evolution website.

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Late Stages of Stellar Evolution . Welcome to the home page of the Late Stages of Stellar Evolution" We are a research group which operates within the Astrophysics Group of the Australia Telescope National Facility. ... To investigate the late stages of stellar evolution and in particular the role of stellar mass-loss in the evolution of asymptotic giant branch stars, proto-planetary nebulae and extremely massive stars. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Moon . ... Space Flight . ... Earth Satellites . ... February . ... By admin February 16, 2012 Posted in: Moon . A roll?n?rock can be seen in this image from NASA?s Lunar Reconnaissance Orbiter. ... This rolling stone gathered no moss but left its track in the regolith until the slope levelled off and it slowed to a halt. ... Then the Moon shone down on an Earth that€а looked superficially familiar to that of today but was oddly different. ...