... 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 . ...

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• Planetary alignment
• May 2002 Planetary Alignment
• More photos of the 1 December events | International Year of Astronomy in

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Space Flight . ... Posted on March 26, 2013 | 4 Comments Many of us may recall captivating images of an enormous glass and steel superstructure making the headlines in the 90тАЩs, along with the tale of eight human test subjects who [ ] . Continue Reading.. ... Posted on May 1, 2012 | ... Posted on February 24, 2012 | ... 10 Comments Where does space begin? ... Posted on January 17, 2012 | ... Part of [ ] . ...

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• Solar System | Astronotes - Part 6
• Immanuel Velikovsky's weird astronomical theories | Astronotes
• NASA | Astronotes - Part 6

... Planets In The Sun . ... Credit: SOHO - LASCO Consortium, ESA , NASA Explanation: Today , all five naked-eye planets (Mercury, Venus, Mars, Jupiter, Saturn) plus the Moon and the Sun will at least approximately line-up. ... The horizontal bars through the planets are digital image artifacts. ... Publications with keywords: Jupiter - Mars - planet - Saturn - Sun - planetary alignment - Moon . Publications with words: Jupiter - Mars - planet - Saturn - Sun - planetary alignment - Moon . ...

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• Астронет > Planets In The Sun
• Journal "Peremennye Zvezdy"
• Venus On The Horizon

... 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! ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Mad Science

... 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 . ...

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• Do other planets have meteor showers like Earth has? Can we see them through
• Can Earth-like lightning and thunder occur on a planet or Moon that exhibits
• The Solar Dynamics Observatory observes Earth, lunar transits in same day |

... 2000 May 5 . Planets In The Sun . Credit: SOHO - LASCO Consortium, ESA , NASA . Explanation: Today , all five naked-eye planets (Mercury, Venus, Mars, Jupiter, Saturn) plus the Moon and the Sun will at least approximately line-up. ... It shows three of the planets along with the Sun's location and bright solar wind regions against a background of stars, but Mars and Venus are unfortunately outside LASCO's roughly 15 degree field of view. ... And what about the Moon ? ... About APOD | ...

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• APOD: 2013 September 19 - Moon, Venus, and Planet Earth
• APOD: 2012 October 11 - Aurorae over Planet Earth
• APOD: August 15, 1995 - Venus: Earth's Sister Planet

... Planet Finder Options I: Linear Nulling Arrays for Studying Earth-Like Planets . ... Missions . ... Future Missions and . ... Missions Office . ... This paper shows options for configuring a symmetric linear nulling array as a Planet Finder. Of special interest are linked in-line pairs of identical sub-arrays with a quarter wave phase shift between them and staggered by half an element spacing. ...

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• Detection of Earth-like Planets with the COROT Space Mission
• Institute for Planets and Life
• John's Favorite Links

... English Sun Mercury Venus Earth Moon Mars Jupiter Saturn Uranus Neptune Pluto Latin Sol Mercurius Venus Terra Luna Mars Jupiter Saturnus Uranus Neptunus Pluto French Soleil Mercure V nus Terre Lune Mars Jupiter Saturne Uranus Neptune Pluton Italian Sole Mercurio Venere Terra Luna Marte Giove Saturno Urano Nettuno Plutone Spanish Sol Mercurio ... See Peter Blinn's Planetary Gazetteer for more . ... Linguistics .. ... Bill Arnett ; last updated: 1999 Mar 17 . ...

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• Lagrangian Points
• Discovery of the Solar System
• Seeing the Solar System

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• Formation of the Earth
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... General information . ... Staff . Research staff . Technical, administrative & librarian staff . ... Staff in alphabetic order . Research . ... Solar physics . ... Information . Resources and catalogs . ... Historical highlights . Historical research . Historical archive . ... Online resources . Friends of Arcetri . ... NSSDC - National Space Science Data Center . ... a rXiv e-Prints archive . ... High Energy Astrophysics Science Archive Research Center . ...

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• Books and E-Books
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• Sun, Planet and Satellite Data

In ancient times the solar system was thought to be the whole Universe, so the study of planetary motions was cosmology. ... The planets other than the Moon and Sun generally move West to East through the stars, but occasionally stop and move in the opposite direction ( retrograde motion). In order to explain the retrograde motion of the planets, the geocentric model of the Solar System shown above puts the planets on small circles called epicycles . ...

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Here user should specify the origin of coordinate system (observer's position). In case of rectangular coordinates it can be center of any major planet or the Sun or any minor planet. ... For spherical coordinates the origin of coordinate system can coincide only with the center of the Earth or with any point on the Earth surface. ... a)by code of observatory in the list of observatories maintained by Minor Planet Center (see IX. Observatories ). b)by introducing name of observatory. ...

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• AY2012 (contents)
• AY2016 (contents)
• AY2015 (contents)

Heliocentric model of Aristarch Samossky (III c. B.C.). The Moon turns around the Earth. The Earth rotates around its axis, that is why the cauge of day and night can be seen. ... Aristarch model explained the modification of Venus and Mars glitter. In B1 position Venus is seen as a round dark spot on the Sun's disk; in B2 position it is seen as a bright spot of assimetric form. In M1 position Mars is nearer to the Earth and has more bright glitter than in M2 position. ...

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• Keplere
• earthe
• venerae

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• Flight to Mars: the Return Trip
• Planetary Magnetism
• The Scale of the Solar System

The AstroGuide . ... AstroGuide | ... AstroGuide Listing . Login . See many more Astronomy Listings by: Category or Alphabet . ... Listed Since July 15, 1998 . ... Web Site . ... However, you must Login to submit a comment. ... Web . www.astronomy.net . About Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

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• Lowell Observatory Near-Earth Object Search - LONEOS, AstroGuide Listing
• Near Earth Object Program, AstroGuide Listing
• Pluto Is Not A Planet, But A Moon Of Neptune. - an Astronomy Net God Science

With this knowledge of orbits, we are ready to plan a trip to Mars. ... The spacecraft will already have the 107,000 kilometers per hour (66,500 miles per hour) speed of Earth, whereas Mars moves at only 86,900 kilometers per hour (53,900 miles per hour). ... A speed of about 42,000 kilometers per hour will be enough to escape the Earth's gravity and, when added to the Earth's orbital speed around the Sun, put the spacecraft on a Hohmann transfer orbit to the Red Planet. ... 1,570,000 . ... Earth . ...

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• ASP: Determining the Earth-Sun Distance Using Mars
• ASP: Exploring Venus
• ASP: Responsible Exploration

Microsymposium 38, MS015, 2003 (letter format) MARS: MOVEMENT OF GEOGRAPHICAL POLES AND DEFORMATION OF ITS SURFACE. ... The global analysis of the Earth linear structure elements has allowed to define the position of geographical poles in the different geochronological periods [3, 4]. ... It is the curves that unite sequences of geographical poles - poles of symmetry of faults in the global stress field fixed by faults on a surface of the mantle during its rotation around of the core. ...

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• http://selena.sai.msu.ru/Rod/Publications/ms40/21_Dolitsky_etal.pdf
• Vladislav V. Shevchenko

... Go directly to the moons of: . Mercury Venus Mars Jupiter Saturn Uranus Neptune Pluto . Go directly to the surface features of Earth's Moon and Mars . Planet & Moons . Pronunciation . ... Mercury . ... Mars: . 2 moons . ... Jupiter: . ... Neptune: . ... 1 moon . ...

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• Surface Features of Earth's Moon and Mars
• Astronomical Glossary - S - Z

... Science User Portal . ... ESO, the European Southern Observatory . ... Weekend Visits to the ALMA OSF . ... Survey Telescopes . ... ALMA . ... Star Clusters . ... 2016 . 2015 . 2014 . ... Stars@ESO . ... Although HD 97300 is in the spotlight for now, the very dust that makes it so hard to miss heralds the birth of additional, potentially scene-stealing, future stars. eso1604 тАФ Science Release . ... 31 March 2016 тАФ ann16021 . ... 29 March 2016 тАФ ann16020 . ... 29 March 2016 тАФ ann16019 . ...

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• ESO. Astronomy from Planet Earth | ESO
• Animation of artistтАЩs impression of the super-Earth planet HD 85512 b | ESO
• The Earth-like Planet Gliese 581 c (artist's impression) | ESO

... Research . ... NASA's "follow the water" philosophy has led me to study atmosphere-regolith interactions on Mars in search for locations and times where liquid water is available. ... Transient liquid water and water activity at Gale crater Mars. ... Rivera-Valentin, E. G. , Chevrier, V. F., 2015. ... Icarus , 253, 156-158. Lopez Garcia, E. J., Rivera-Valentin, E. G. , Schenk, P. M., Hammond, N. P., Barr, A. C., 2014. ... Icarus , 237, 419-421. ... Chevrier, V. F., Rivera-Valentin, E. G. , 2012. ...

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• Comets National Astronomy and Ionosphere Center (Arecibo Observatory)
• Arecibo Radar Discovers Triple Near-Earth Asteroid
• Asteroids National Astronomy and Ionosphere Center (Arecibo Observatory)