... 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 . ...

Astronomy Picture of the Day . Star Party on Planet Earth . ... 4.04.2009 . ... Credit Copyright: Babak Tafreshi ( TWAN ) Explanation: As twilight sweeps around planet Earth tonight (April 4), many amateur astronomers will set up their telescopes for a 24-hour global star party. The planetwide star party is part of 100 Hours of Astronomy (100HA) , a project of the International Year of Astronomy 2009. ... April . ... April 2009 . ... Publications with keywords: telescope - IYA2009 . ...

... Planets . ... The planets were found using the HARPS instrument on the 3.6m telescope at ESOтАЩs La Silla Observatory. ... A planet in orbit around a star causes the star to regularly move towards and away from observers on Earth. ... One newly discovered planet, HD 85512 b, is best hope found so far for a habitable exoplanet. ... The HARPS team so far have found that about 40% of stars similar to own Sun have at least one planet smaller than Saturn (which is 95 times more massive than Earth). ...

lsst.tcc љ 1.2.2-3-g89ecb63 . ... Files . FileљList . ... src . earth.cc . ... 6 љ #include " tcc/earth.h " . ... 22 љ void Earth::updateSite (coordConv::Site &site, double tai ) const { . 23 љ int ind; . ... tcc::Earth::poleInterceptX . ... Definition: earth.h:18 . tcc::Earth::Earth . ... tcc::Earth::poleInterceptY . ... tcc::Earth::poleSlopeY . ... tcc::Earth::updateSite . ... tcc::Earth::utcDay . ... tcc::Earth::ut1_taiSlope . ... tcc::Earth::poleSlopeX . ... tcc::Earth::startTAI . ...

... These 'anomalies' include binary sources and lenses (especially a star with a planet), a finite extent of the source and its brightness profile, and rotation effects in the observer (earth around sun), the lens, and the source. To fit light curves which involve binary lenses, I have developed a code, which now works also for extended sources, and which also includes all rotation effects. ...

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... SEARCH ASP SITE: Match ALL words Match ANY word . ... Astronomy Education Bibliography . ... Women in Astronomy . ... Light Pollution . ... Observatory Sites and the Environment . ... As human activity changes that environment, issues are raised for both astronomers and those who enjoy the fruits of their research. ... Crawford, D. Hunter, T. "The Battle Against Light Pollution" in Sky Telescope, July 1990, p. 23. ... Hendry, A. "Light Pollution: A Status Report" in Sky Telescope, June 1984, p. 504....

... How to Spot a Pale Blue Dot in the Night Sky - Signatures of Life on Extrasolar Planets . ... Frame 2: Steamy atmosphere, an ocean is covering the entire planet, no oxygen is present, timeline about four billion years ago. ... Using such telescopes as Kepler, James Webb Space Telescope (JWST), Darwin and Terrestrial Planet Finder (TPF), and masking the star light, the light from small Earth-like planets can be collected and analyzed. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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... 2009 April 4 . Star Party on Planet Earth . ... Explanation: As twilight sweeps around planet Earth tonight (April 4), many amateur astronomers will set up their telescopes for a 24-hour global star party. The planetwide star party is part of 100 Hours of Astronomy (100HA) , a project of the International Year of Astronomy 2009. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . NASA Web Privacy Policy and Important Notices . A service of: ASD at NASA / GSFC . ...