... 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 . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Earth Satellites . ... Leonid meteors seen from 13 km altitude aboard an aircraft during the 1999 Leonids Multi-Instrument Aircraft Campaign (Leonid-MAC). Comet Tempel-Tuttle provides the cometary debris for the Leonid meteor shower. ... Every 17-19 November Earth crosses Tempel-TuttleтАЩs orbit and the Leonids become visible. With clear, dark skies observers may see 10 to 15 Leonid meteors every hour on those mornings. ...

... Editor's choices for the most educational Astronomy Pictures of the Day about Earth's Moon: . ... Explanation: Our Moon's appearance changes nightly. This time-lapse sequence shows what our Moon looks like during a lunation , a complete lunar cycle. ... APOD: 2003 May 22 - Eclipsed Moon Montage . Explanation: After watching this month's lunar eclipse, amateur astronomer Sebastien Gauthier carefully composed this montage of telescopic images of the Moon sliding through planet Earth's shadow. ...

... Credit Copyright: Malcolm Park ( North York Astronomical Association ) Explanation: Leonid meteors rained down on planet Earth this week, the annual shower of dusty debris from the orbit of Comet 55P/Tempel-Tuttle . ... Recorded with camera fixed to a tripod, the individual frames capture the bright meteor activity throughout the night of November 16/17, about a day before the shower's very modest peak . ... November . ... Publications with keywords: Leonid meteor shower . ... Leonid Meteors Streak ...

... It's a Meteor Shower Smaller than grains of sand, meteors vaporize in a bright streak of light as they hit Earth's atmosphere. Meteor showers come from comets, but the sporadic meteors on other nights are mostly asteroid bits. ... Meteor Showers Come From Comets Jupiter Earth Sun Comet Mercury Tips: A bright Moon can wash out meteors, making them hard to see. ... But the comet bits hit Earth's atmosphere so fast, the pieces vaporize in bright streaks -- making a meteor shower! ...

... Articles | ... Forums . ... 230 deg . 49 deg . ... 130 deg . ... More Info . ... 210 deg . ... 168 deg . ... 249 deg . ... 195 deg . ... 271 deg . ... 110 deg . ... 338 deg . ... July 15 . 247 deg . ... 224 deg . ... 340 deg . ... July Phoenicids (PHE) . ... August 10 . 341 deg . ... 339 deg . ... 307 deg . ... 334 deg . ... 335 deg . ... 286 deg . ... 327 deg . ... 262 deg . ... 102 deg . ... 153 deg . ... 117 deg . ... December 2 . ... 123 deg . ... 100 deg . ... www.astronomy.net . ...

... Observing . ... Leonid meteor shower peaks mid-November . During November, the Leonid meteor shower will produce up to 15 meteors per hour. ... Although the Full Moon that occurs on the same day as the Leonids peak November 17 will diminish the view, 15 meteors per hour still will radiate from the constellation Leo the Lion. ... Annually, the Leonid meteor shower deposits 12 13 tons of material across the planet. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

Thought-Provoking Imagery Shows Sun's Place in the Galaxy . ... SOHO - Explosive Coronal Mass Ejections from the Sun . SOHO-6 Comet at 2-6 solar radii from the Sun . ... The remarkable images come from SOHO's visible-light coronagraph, LASCO, which is able to mask the intense rays from the Sun's surface in order to reveal the much fainter glow of the solar atmosphere, or corona. ... SOHO is ideally placed to report and even anticipate their origins in the Sun's atmosphere. ... The Sun . ...

Asteroid 2005 YU55 was listed on NASA's "Sentry Risk Page" as having as small (about one in 10 million) chance of hitting the Earth in the next century. We observed this asteroid with the Arecibo Planetary Radar system on April 19-23 2010. ... We obtained radar images of asteroid 2005 YU55 at 11 PM local time on 2011 Nov 9 using the Arecibo Observatory Planetary Radar System in Puerto Rico and the Robert W. Byrd Green Bank Telescope in West Virginia. ... Last modified 2011 November 14 . ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : The Moon only shows one face to us because it is not rotating. Better astronomy : The Moon only shows one face because it is rotating, once every time it revolves around the Earth. ... Place the Moon model on the table about 30 centimeters (one foot) away with the X facing the Earth model. ... You'll see that to keep the X facing the Earth model, you have to rotate the Moon model as it goes around the Earth model . ... 2008 Phil Plait. ...

... The remote planet Pluto and its moon Charon orbit the Sun at a mean distance of almost 6,000 million kilometres, or nearly fourty times farther out than the Earth. During a recent investigation by an international group of astronomers [1], the best picture ever of Pluto and Charon [2] was secured with the European Space Agency's Faint Object Camera at the Hubble Space Telescope (HST). ... The new HST image was taken when Charon was near its maximum elongation from Pluto (0.9 arcseconds). ...

The Chandra X-ray Observatory is the third of NASA's four " Great Observatories ", and is used by Astronomers to study some of the more extreme objects and events (in terms of temperature and mass) in the Universe. ... This page uses Javascript to show you the timeline for Chandra, NASA's X-ray Observatory. ... If you can not enable Javascript, much of the information is available at the Chandra X-ray Center . Further information on Chandra can be found at: . ... The Chandra X-ray Center . ...

... Comments, Opinions Publications Dnepr Program . Dnepr launch record 17 August 2011. Cluster Launch of Dnepr LV 22 August 2013 KOMPSAT-5 Launch 21 November 2013. ... The Sych-2 satellite is being developed as a part of the space optical-range Earth observation system by the State Design Office of Yuzhnoye and built by the Industrial Association Yuzhny Machine Building Plant in cooperation w ith other space industry entities upon the state order of the National Space Agency of Ukraine . ...

... Earth is the tiny spot between Jupiter and the Sun). ... Distance Radius Mass Name Orbits (000 km) (km) (kg) --------- ------- -------- ------- ------- Sun 697000 1.99e30 Jupiter Sun 778000 71492 1.90e27 Saturn Sun 1429000 60268 5.69e26 Uranus Sun 2870990 25559 8.69e25 * Neptune Sun 4504300 24764 1.02e26 * Earth Sun 149600 6378 5.98e24 Venus Sun 108200 6052 4.87e24 Mars Sun 227940 3398 6.42e23 Ganymede Jupiter 1070 2631 1.48e23 + Titan ... Extrema .. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... Asteroid . ... Site . ... The evening of October 26, 2011, Mark Trueblood, Robert Crawford, and Larry Lebofsky used the Kitt Peak 2.1-m telescope to observe Near Earth Asteroid (NEA) 2008 QT3. ... single still jpeg frame . ... The National Optical Astronomy Observatory (NOAO) issued a press release concerning Morgan's work on Monday, November 21, 2011 and posted it on the home page of their web site . ... 2013 Winer Observatory. ...

On September 15, 1998, the STScI director, Dr. Steven Beckwith, announced a special observation opportunity to the astronomical community during the Leonid Meteor Shower. During the peak of the Leonid meteor shower on November 17, 1998, HST will be pointed near the anti-radiant for ten hours. Anyone who is interested can submit ideas to STScI for scientific observations during this time. ... There are no HST observations in the archives for objects in this field. ...

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... Aurora . ... William Gilbert The north-south pointing property of the compass needle was discovered in China around the year 1000, and in 1600 William Gilbert in London showed that this could be explained if the entire Earth was a huge magnet. ... Only after 1958, when the first scientific spacecraft were launched and when Explorers 1 and 3 discovered the radiation belt, did scientists fully appreciate the complexity of electric and magnetic phenomena that occur in the Earth's magnetic environment. ...

ATNF Home . ... About ATNF overview . News | ... Australia Telescope Steering Committee . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... While early stages of commissioning continue at the Murchison Radio-astronomy Observatory (MRO) , the ASKAP Computing team has meanwhile been refining processing pipelines by running simulated observations on the ASKAP Central Processor. ...

... About meteorites . ... Meteorite Dronino . ... New iron meteorite shower found! Meteorite Encyclopedia . ... About laboratory . ... Dronino iron meteorite . ... Mr. Gus'kov felt that further efforts by Milanovsky were likely to be unsuccessful, so he searched further and found our Meteorites Laboratory. The Laboratory's analysis showed that the Dronino Iron has a meteorite origin. ... Dronino is the 111th meteorite and only the third iron-meteorite shower found in Russia in the last 250 years. ...