... Bad Astronomy . ... Bad Astronomy : Comets whiz across the sky in a few seconds. Good astronomy : Comets appear to move very slowly, usually taking days to noticeably move. ... The orbital periods of comets are measured in years; the most famous comet of all, Comet Halley (usually--- and incorrectly-- called ``Halley's Comet''), takes about 76 years to orbit the Sun just once. ... Now, when a comet gets near the Earth, it tends to be moving pretty quickly. ... Want to know more about comets? ...

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• Phil Plait's Bad Astronomy: Mad Science
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National Aeronautics and Space Administration . Lyndon B. Johnson Space Center . ... SHANNON W. LUCID (Ph.D.) . nasa astronaut (former) . ... She is qualified for assignment as a mission specialist on Space Shuttle flight crews. ... A veteran of five space flights, Dr. Lucid has logged 5,354 hours (223 days) in space. ... Dr. Lucid retired from NASA in January 2012. ... In completing this flight, Dr. Lucid logged 838 hours and 54 minutes in space. ... FEBRUARY 2012 ...

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• Astronaut Bio: John E. Blaha (05/2008)
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... 2006 May 13 . Crumbling Comet . Credit: William Reach ( SSC /Caltech), et al. JPL , Caltech , NASA . ... Recorded on May 4-6 by an infrared camera on board the Spitzer Space Telescope, the picture captures about 45 of the 60 or more alphabetically cataloged large comet fragments. ... Looking for clues to how the comet broke up, Spitzer's infrared view also captures the trail of dust left over as the comet deteriorated during previous passes . ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD: 2012 March 3 - Another Tail for Comet Garradd
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Comets necessarily obey the same physical laws as every other object. ... If one considers only two bodies -- either the Sun and a planet, or the Sun and a comet -- the smaller body appears to follow an elliptical path or orbit about the Sun, which is at one focus of the ellipse. ... Another quantity that is conserved is called angular momentum. ... Comets simply are bodies which in general have more angular momentum per unit mass than do planets and therefore move in more elongated orbits. ...

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... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Orbit of 21P/Giacobini-Zinner showing the comet's position on 2011 October 8, and also the Minimum Orbit Intersection Distance between the cometary and Jovian orbits. ... Outbursts and storms in the October Draconid meteor shower occur because meteroids from the parent periodic comet, 21P/Giacobini-Zinner, are not dispersed uniformly around the stream. ... Last Revised: 2012 October 10th . ...

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Astronomy Picture of the Day . ... 13.05.2006 . ... JPL , Caltech , NASA Explanation: This false-color mosaic of crumbling comet Schwassmann-Wachmann 3 spans about 6 degrees (12 full moons) along the comet's orbit. Recorded on May 4-6 by an infrared camera on board the Spitzer Space Telescope, the picture captures about 45 of the 60 or more alphabetically cataloged large comet fragments. ... Publications with keywords: comet - infrared . ... Comet Holmes Over Hungary . A Tale of Comet Holmes . ...

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• XWare > APOD

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Our Galaxy . ... Weird and Fun . ... It came from another galaxy: This artistтАЩs impression shows HIP 13044 b, an exoplanet orbiting a star that entered our galaxy from beyond. ... HIP 13044 is one of tens of millions of stars in the тАЬHelmi streamтАЭ, stars that belonged to a dwarf galaxy consumed by our own Milky Way galaxy, some six to nine billion years ago. ... Tweets that mention ESO finds weird doomed planet from another galaxy | ...

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Meteor Streams: the Relation to Hazardous Celestial Bodies . ... Analytically tractable, the evolution of meteor particles' elliptic orbits in a gravitational field of the Sun is considered in view of light pressure, the Poynting Robertson effect, and the corpuscular analogue of Poynting Robertson effect. ... In the context of the perturbed two-body problem, the criterion for the probable meteor particles parent bodies are identified. ...

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... An artificial comet holds secrets to Earths life . ... Planets, orbits, and comets are somewhat round. Is there an underlying mechanism or physical law? ... The force of gravity is also responsible for the elliptical, and occasionally circular, shapes of orbits. ... Get instant access to subscriber content on Astronomy.com! ... If you are already registered on Astronomy.com, please log in below. ...

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Classroom Activity: A Viewgraph Comet . ... This will simulate the Earth's orbit around the Sun. ... Draw several comets along the path with their tails pointing away from the Sun. ... You can create other viewgraphs that have a smaller scale and show several comet orbits or constellations. ... Show how the Earth's orbit is almost circular compared to the comet's. Explain that the Sun is at the focus of the orbits of the planets, asteroids, and comets. ... Actually, comets have two tails. ...

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Youth for Astronomy and Engineering . ... Events . ... Parents . ... The aim of the Youth for Astronomy and Engineering program is to associate science and technology, as well as working on scientific- or technology-related activities, with fun and challenging experiences. Youth for Astronomy and Engineering events create a positive and supportive experience for up to 150 young men and women each year as they make their choices about high school courses, college majors, and activities. ...

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... Soyuz TMA TSC Flight Engineer, . ... Recipient of the United States Air Force Test Pilot School Colonel Ray Jones Award as the top flight test engineer/flight test navigator. ... In 1994, upon completion of the United States Air force Test Pilot School, Edwards Air Force Base, California, Fincke was assigned to the 39th Flight Test Squadron, Eglin Air Force Base, Florida, where he served as a flight test engineer working on a variety of test programs, as well as flying the F-16 and F-15 aircraft. ...

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Michele Bannister . Other research . ... The mutual events of Haumea . The dwarf planet Haumea is the parent of a collisional family that includes its two moons, Hi'iaka and Namaka. ... The arid and windswept McMurdo Dry Valleys of Antarctica are carpeted with the polygons of patterned ground , a geological formation that is also seen on the northern plains of the planet Mars. ... I worked to understand the influence that buried masses of ice have on the development of patterned ground. ...

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• THE AUSTRALIAN NATIONAL UNIVERSITY
• Miss Joan Duffield inspects the repairs to her parents' headstones
• Orbits

U nlike the other small bodies in the solar system, comets have been known since antiquity. There are Chinese records of Comet Halley going back to at least 240 BC. ... W hen they are near the Sun and active, comets have several distinct parts: . ... A comet whose orbit takes it near the Sun is also likely to either impact one of the planets or the Sun or to be ejected out of the solar system by a close encounter (esp. with Jupiter). ... more comet images . ... Comet Hale-Bopp (C/1995 O1) . ...

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. Name . Last modified . Size . Description . Parent Directory . - . atsirk.sty . 13-Mar-2012 11:14 . 1.3K . ocet.eps . 26-Jul-2011 18:48 . 316K . sample_e.pdf . 15-Jul-2014 11:29 . 381K . sample_e.tex . 15-Jul-2014 11:27 . 8.6K . sample_r.pdf . 07-Dec-2015 11:26 . 421K . sample_r.tex . 07-Dec-2015 11:05 . 8.3K . Apache/2.2.22 (Ubuntu) Server at comet.sai.msu.ru Port 80

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... Science User Portal . ... For the first time, astronomers have been able to directly follow the motion of an exoplanet as it moves from one side of its host star to the other. ... Only 12 million years old, or less than three-thousandths of the age of the Sun, Beta Pictoris is 75% more massive than our parent star. ... This research was presented in a paper to appear this week in Science Express (тАЬA Giant Planet Imaged in the disk of the Young Star Beta Pictoris,тАЭ by A.-M. Lagrange et al.) ...

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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 ) ґ ...

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• Pulkovo NEO Page: Ephemeris Support

... Parents who home-school their children often find it hard to locate suitable material for teaching astronomy and physics, as well as earth and space sciences, especially at the level of upper grades. ... Stargazers" also includes a linked, annotated timeline that covers 13,000 B.C.-2003 A.D. which allows parent-teachers to relate the science to history. ... I am grateful to a homeschooling parent, Mrs. April Dykes, for volunteering to handle the distribution of such disks, at cost. ... April Dykes ....

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• Index of /da/interball/tail/orbit/nadya/ikiodb
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Name Last modified Size Description . Parent Directory - 20131118/ 2015-04-20 02:33 - 20150107/ 2015-04-20 02:34 - . Apache/2.4.6 (Linux/SUSE) Server at www.astro.louisville.edu Port 80

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... It is astronomical site. ... Russian page (Win 1251) . ... New Astronomy . ESA: European Space Agency . ... Messier Catalog : a collection of the most beautiful objects in the sky . ... EAAE: European Association for Astronomy Education . ... Observation of Comets . ... Orbit and Ephemeris Information for Comet Hale-Bopp (1995 O1) . ... Solar Eclipse on March 9, 1997 . Sky Telescope: The Essential Magazine of Astronomy . ... SKY Online's Comet Page (Sky Publishing Corporation) . ...

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