... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Asteroid 2010 SO16 and the Earth follow similar orbits around . the Sun. ... out a horseshoe shape in space, taking 175 years to go from . ... Asteroid 2010 SO16 takes 175 years to make the trip from one end of the horseshoe to the other. ... Currently, three other horseshoe companions of the Earth are known to exist but, unlike 2010 SO16, these linger for a few thousand years at most before moving on to different orbits. ...

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• Armagh Astropark: The Planets
• Armagh Astropark
• Searching for Planets Around Other Stars - from Galway: Monday 13 October 2008

... This artist's impression shows the remarkable planetary system around the Sun-like star HD 10180 five planets and evidence for two more. ... Richest Planetary System Discovered . ... This remarkable discovery also highlights the fact that we are now entering a new era in exoplanet research: the study of complex planetary systems and not just of individual planets. ... The newly discovered system of planets around HD 10180 is unique in several respects. ...

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• Astronomical Society
• ASP: Astronomy Behind the Headlines
• ASP: Indiana Jones and the Astronomers of Yore

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

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

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

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• Astronomy Plus CCD Images of Galaxies

... 2006 August 28 . Eight Planets and New Solar System Designations . ... Explanation: How many planets are in the Solar System? This popular question now has a new formal answer according the International Astronomical Union (IAU): eight. Last week, the IAU voted on a new definition for planet and Pluto did not make the cut. ... The eight planets now recognized by the IAU are: Mercury , Venus , Earth , Mars , Jupiter , Saturn , Uranus , and Neptune . ... About APOD | ...

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• APOD: January 31, 1996 - Planets Around Sun-Like Stars
• APOD: 2004 June 8 - A Planet Transits the Sun
• APOD: 2002 May 9 - Planets Over Stonehenge

... The study of extra solar planets will be one of the most important areas of research in astronomy in this century. ... The first planets outside the solar system were found in 1992 around the millisecond pulsar PSR B1257+12 by Alex Wolszczan at the Arecibo Observatory . ... Three space missions based on this principle (MOST, COROT and Kepler ) have already been launched or approved, and have the last one at least has the potential to find Earth-sized planets. ... SIM ( NASA ) is one of such missions...

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• astronomers detect coolest star
• Astronomers Detect Coolest Radio Star National Astronomy and Ionosphere Center

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Moon . ... Comets and Asteroids . ... What changed our view of Chariklo is the discovery of a ring system around it, the first such feature found around a Solar System body smaller than a gas giant planet. ... Almost certainly the rings were born when a collision with a smaller asteroid blasted millions of tonnes of debris off CharikloтАЩs surface. ... A ring system detected around the Centaur (10199) Chariklo (Braga-Rigas et al.) ...

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• Exoplanet HAT-P-1b: weird, warm and fuzzy | Astronotes
• Kepler-10c: the First Mega-Earth | Astronotes
• Kepler 36b and c: Too Close for Comfort | Astronotes

... SATELLITE: An object that revolves around a planet. ... SIDEREAL DAY: The length of a planet's rotation period relative to the stars. SOLAR SYSTEM: The sun and all the objects that are held in its gravitational field and move around it. ... SUPERIOR CONJUNCTION: The position of a planet when it is on the opposite side of the Sun from Earth (thus making in invisible). ... TRANSIT: The movement of an object between the Earth and the Sun and showing on the surface of the sun as a black dot. ...

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• RAS Glossary A to C
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God Science Forum Message . ... God and Science | ... Pluto Is Not A Planet, But A Moon Of Neptune. ... Pluto Is Not a Planet, but a Moon of Neptune . 60 years ago, at 1947, the late Mohammed Ali Hassan Al-Hilly, said in his book: (The Universe and the Quran), that Pluto is not a planet but a moon of Neptune. ... He said: " Astronomers, however, think that Pluto is a planet, but I say it is merely a moon of Neptune, and actually it is not a planet. ... www.astronomy.net . About Astronomy Net | ...

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• Moon, Planets And Aurora, Oh My! - an Astronomy Net Article
• Astronomy articles, forums, listings, and other resources about Astronomy.
• Southern Adelaide Astronomical Minor Planet Observatory, AstroGuide Listing

T he Nine Planets is a collection of information about our Solar System intended for a general audience with little technical background. ... T his document consists of about 90 WWW "pages", one page for each major body in the Solar System. ... if the object has satellites then its page has a table of data on them and links to their pages, . ... To visit the next body in an ordered traversal of the solar system choose the link immediately to the right of the name of the current page. ...

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• Astronomical Names
• Kepler and His Laws
• Discovery of the Solar System

... Club By-laws . ... Other Club Activities . ... Public Nights . ... Dr. James Green, NASA, Director Planetary Science will be our esteemed speaker on Tuesday, April 12, 2016 at 7:30 PM in Peyton Hall on the Princeton University campus. ... Our astronomers setup telescopes for public use at Communiversity in Princeton, Super Science Saturday at the NJ State Museum in Trenton and at various public events around Mercer County. ... Amateur Astronomers Association of Princeton, Inc., ...

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Astronomy Picture of the Day . ... 31.01.1996 . ... Credit: E. Williams, G. Marcy, and L.-A. McConnaughey, ( UC Berkeley ), ( SFSU ) Explanation: Do many Sun -like stars have planets? ... The above plot summarizes the four known cases of normal stars having planets. ... The later two cases were discovered by astronomers led by Geoff Marcy and Paul Butler as part of a greater project inspecting 120 stars for orbiting planets. ... January 1996 . ... 1995 1996 . ... Publications with keywords: planets . ...

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• XWare > APOD

... Visibility of Small Solar-System Bodies . Asteroids) in 2009 : . ... Distance (AU) . ... Jan. 12, 2009 . ... 8.8 m . ... is at opposition on July 4, 2009 . ... Apparent . ... from Sun (AU) . ... is at opposition on September 21, 2009 . ... middle distance between Earth and Sun, equal 149.6 millions km. ... Mean Distance: . ... a configuration of the Sun, Earth and a planet in which the apparent geocentric longitude of the planet differs by 180 from the apparent geocentric longitude of the Sun. ...

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• MAO NASU :: Topic: August Issue: How We Conquered the Planet (1/1)

... Over the past 16 years, astronomers have found more than 700 planets outside of our Solar System. We call these distant worlds exo-planets . ... For example, they can observe how a star dims when a planet passes in front of it. ... In this new method, astronomers use stars like magnifying glasses! ... And astronomers can tell if the star that is acting like a magnifying glass has a planet in orbit around it, as the power of the magnification is even greater! ...

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• Exoplanet Caught on the Move | ESO
• Gaitee Hussain @ ESO

Johann Kepler - a Legislator of the Sky. The laws of the planets movements put by Johann Kepler destroyed the thousand year old dogmas about the circles and spheres and opened the way to scientific understanding of celestial occurrences. ... The best object for observation was Mars - its orbit unlike the Earth's one has a noticeable eccentricity, the rotation period in comparison with Jupiter and Saturn is not too long and observation conditions are better than for Mercury and Venus. ...

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• smalltelae
• Kopernike
• plutone

... Star Atlas . ... Planets found around twin stars . Astronomers using NASA's Spitzer Space Telescope have found thriving planetary systems orbiting twin stars. ... Standard planet-hunting techniques generally don't work well with these stars, but, in 2005, a NASA-funded astronomer found evidence for a planet candidate in one such multiple-star system. ... Their presence indicates that the process of building planets has occurred around a star, or stars, possibly resulting in intact, mature planets. ...

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• Astronomers image lowest-mass exoplanets around a Sun-like star | Astronomy.com
• Would it be possible to find a moon around an extrasolar planet? If so, how? |
• A planet is forming in an Earth-like orbit around a young star | Astronomy.com

Geotimes -- November 2005 -- Two more moons for "planet" Pluto http://www.geotimes.org/nov05/WebExtra110305.html Web Extra Thursday, November 3, 2005 Two more moons for Pluto When the New Horizons spacecraft finally reaches Pluto in July 2015, researchers will have more objects to study than previously thought. In addition to Pluto's confirmed moon Charon, astronomers have detected two more orbiting celestial bodies, which could help reveal how the planet and moon system formed. ...

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• http://www.stsci.edu/~mperrin/papers/insearch.html
• http://www.stsci.edu/stsci/meetings/planets/abs/prog7.html
• Research Interests

... The Australian National University] [Department of Physics] [Paul Francis] [Main Roleplay Page] . These exercises are my attempt to adapt the technique of Problem Based Learning to the context of introductory astronomy and astrophysics classes. ... As students grapple with the puzzle, they are forced to learn the subject matter of the course. ... This exercise is designed for 1st year University students with a reasonable high-school background in Maths and Physics. ...

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• Paul Francis -- Astronomical Constants
• The Zodiacal light seen above the eastern horizon nearly two hours before
• The Zodiacal light seen above the western horizon nearly two hours after sunset

... малой планете . ... на основании решения от 9 мая 2001 года . Комитета по наименованию малых планет . ... что малая планета, . зарегистрированная в международном каталоге малых планет . под N 11438 и имеющая предварительное обозначение 1973 QR1, . ... ZELDOVICH . ... Якова Борисовича Зельдовича . ... 11438) Zeidovich = 1973 QR1 . ... Малая планета (11438) Zeidovich открыта 29 августа 1973 г. Т.M.Смирновой в Крымской астрофизической обсерватории. ... Циркуляр Малых Планет N 42672, 2001. ...

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• Astronomical Periodical Publications
• Seminars

... Many massive planets contrary to Jupiter have large eccentricities of orbits. ... Another problem is to study the conditions and boundaries of stable, regular motions of small mass planet in systems having `Jupiter' with large orbital eccentricity as well as properties of regular, stable, and irregular, chaotic motions. ... The regular eccentricity evolution described above demonstrates that stable quasi--circular orbits of small planet are unusual. ...

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• EPHEMERIDIES OF MINOR PLANETS (EMP)
• AY2016 (contents)
• AY2009 (contents)