... 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! ... Armagh Planetarium . ... Comets and Asteroids . ... Space Flight . ... Hartley 2 seen by Deep Impact (Image credit: NASA/JPL-Caltech/UMD) . ... Deep Impact: little-known to the general public but hugely important. ... Deep Impact is no stranger to comets, having visited (and bombarded) Comet Tempel 1 in 2005 . ... Hartley was present at the Jet Propulsion Laboratory (JPL) in California to see the images of his comet as they arrived from deep space. ...

Hubble Space Telescope image of Jupiter showing the impact site of comet Shoemaker-Levy 9 fragment G. The image was taken on 18 July 1994 about an hour and 45 minutes after the impact. The impact site is the dark round area below and right of the center of the frame, at about 45 S latitude. ... The fragments of Shoemaker-Levy 9 impacted Jupiter at about 60 km/s and left traces in the atmosphere which could be observed for many weeks. ... Central Latitude/Longitude (deg): N/A . ...

... Many large telescopes will be available on Earth with which to observe the phenomena associated with the Shoemaker-Levy 9 impacts on Jupiter in visible, infrared, and radio wavelengths. ... The impact site of the fragments of Comet Shoemaker-Levy 9 on Jupiter. ... Better knowledge of the effects of Comet Shoemaker-Levy 9 on Jupiter may allow scientists to predict more accurately just how serious could be the results of future impacts of various-sized bodies on Earth. ... 87,500,000,000 . ... 320,000...

Check out some poking around I've been doing on comet and asteroid dynamics from various databases. Comets are bad for our health! Well, at least over the long term-- look at what just *one* fragmet of Shoemaker-Levy 9 (the comet which impacted Jupiter in July of 1994) would have done had it hit Michigan instead of Jupiter! ... Charles Morris' JPL Comet Page . Mike A'Hearn's Home Page . Casey Lisse's Home Page . Small Bodies Node ...

... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

A team of scientists believes they have discovered a chain of impact craters in the central African country of Chad that suggests ancient Earth may have been hit by a large, fragmented comet or asteroid similar to the Shoemaker-Levy 9 comet that slammed into Jupiter in 1994. The craters were discovered in radar images of the Earth taken by the Spaceborne Imaging Radar C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) that flew on the Space Shuttle Endeavour in April and October of 1994. ...

Short-Period Comets: Origin and Terrestrial Impact Hazard . ... The model is consistent with the basic observed distributions of near-parabolic comets, short-period comets, Centaurs and high-eccentricity trans-Neptunian objects.This model requires that initial objects in the early Solar System are concentrated to the outer planetary region, and the physical lifetime of comets in the inner planetary region at the present epoch is an increasing function of initial perihelion distances. ...

... Shortly after its discovery it was determined to be in a highly elliptical path near Jupiter and on a collision course. ... The size and mass of the original body and the individual fragments is as of this writing still highly uncertain. ... Between 16 July 1994 and 22 July 1994 the fragments impacted the upper atmosphere of Jupiter. ... The pictures were posted to the Net within hours of the impacts and caused severe overloading on some ftp and WWW sites. ... JPL's SL9 page . ... Small Bodies .. ...

... The resulting spectra were analyzed with a kinematic Monte Carlo model which allows estimation of the OH production rate, neutral gas outflow velocity, and distribution of the out-gassing from the nucleus. ... The best-fit model spectrum is shown together with the observed line. ... Both models are scaled to match the average off spectrum. When the same scaling is applied to the nucleus-centered model spectra, shown on the right, it is clear that only the quenched model matches the observations. ...

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . Plenty of information about the hazards of being a planet in our solar system. ... Listed Since July 15, 1998 . ... Web Site . http://impact.arc.nasa.gov/ . ... Additional Information . Web . ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Science User Portal . ... ESO, the European Southern Observatory . ... Travel and Contacts . ... ESO . ... Survey Telescopes . ... Sky field in which Comet Halley was observed with the ESO Very Large Telescope (VLT) at the Paranal Observatory on March 6-8, 2003. 81 individual exposures with a total exposure time of 32284 sec (almost 9 hours) from three of the four 8.2-m telescopes were cleaned and combined to produce this composite photo, displaying numerous faint stars and galaxies in the field. ...

... Future seminars . P a s t seminars . ... Deep Impact: Excaving Comet Tempel 1 " . ... On 4 July 2005 Deep Impact collided with comet Tempel 1, excaving a crater. Deep Impact consisted of two fully functional spacecraft: an impacting spacecraft weighting 364 kg and a flyby spacecraft for observing the impact and relaying data from the impactor. ... The impact was also observed by over 80 ground-based observatories and by several spacecraft (Rosetta, Hubble Space Telescope, Chandra, Spitzer). ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

... Gallery . ... Comet Shoemaker-Levy 9 Impact Images . Sidebar Left . Sidebar Top . ... Title: Comet Shoemaker-Levy 9 Impact Images . Description: Comet Shoemaker-Levy 9 meets Jupiter - July 1994 . ... Owner: Gallery Administrator . ... 3.09, 3.28, 3.42 micron image after fragmentтАж . Views: 2399 . By: Gallery Administrator . 2.34 micron images imact sequence for fragmenтАж . ... 2.34 micron image of fragment D impact . ... Composite 3.42, 3.59, 3.99 micron image of poтАж . ...

Astronomy Picture of the Day . Deep Impact on Comet Tempel 1 from Hubble . ... 18.07.2005 . ... At the direction of terrestrial scientists , a refrigerator-sized probe from the Deep Impact mission struck Comet Tempel 1 on July 4 at over 35,000 kilometers per hour. ... Astronomers will continue to study the images and data returned by Deep Impact to better determine the nature of Comet Tempel 1 and discern clues about the formation dynamics of the early Solar System . ... July . ... July 2005 . ...

Some peculiarities of orbits of observed comets. ... Icarus, 2005 Simulation and reality Distribution of anti-perihelia of short-period comets with e 0.9 ( ecliptic coordinates ) Distribution of anti-perihelia of short-period comets with e 0.9 ( ecliptic coordinates ) Distribution of anti-perihelia of long-period comets with 0.9 e 1 ( ecliptic coordinates ) ­ ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... Ciel Espace, le magazine qui vous guide toujours plus loin . ... Ciel Espace, nouvelle formule, c'est . ... Accueil Stardust va observer le cratГЕre de Deep Impact sur la comГЕte Tempel 1 . ... Voir et mesurer le cratГЕre de Deep Impact permettra de savoir quelle est la consistance de Tempel 1 et dГїduire ses propriГїtГї mГїcaniques. ... De plus, les propriГїtГїs du cratГЕre fourniront aussi une indication plus prГїcise de la structure de cette comГЕte, qui a une influence sur sa rГїponse Г un...

... To save time, I will only provide ephemerides in 2000 coordinates. ... Note: most the orbital elements used to create these ephemerides were obtained from the International Astronomical Union Circulars (IAUCs), Minor Planet Circulars (MPCs) or the ICQ Comet Handbook. ... The following 1-day ephemeris (March 1, 1997 - October 1, 1997) is from Donald Yeomans of JPL and is based on Reference Orbit #55 (March 4, 1997). 2000 coordinates (March - September, 1997) [3/4/97] . ... Epoch: 1997 Feb. 1.0 . ...