... This lesson plan supplements: "The Path of the Sun, the Ecliptic," section #2: on disk Secliptc.htm , on the web . ... Terms: Zodiac, ecliptic (the line across the celestial sphere),the plane of the ecliptic (flat surface), zodiac, solar eclipse, lunar eclipse [umbra, penumbra]. ... If the Sun and the Earth are in the plane of the ecliptic, the Moon, which is between them, also must be in the plane. (b) In an eclipse of the Moon , the Earth comes between the Moon and the Sun. ...

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• The Path of the Sun, the Ecliptic

... Like the night sky on the Earth, the martian sky hosts a plethora of astronomical phenomena occurring around the clock in a neverending space opera played out for the benefit of robotic and future human observers alike. ... Moons . Mars has two moons, Phobos and Deimos . ... Under the same conditions, Deimos would be as bright as -5, somewhat brighter than the planet Venus appears in Earth's sky. ... The moons are also eclipsed by Mars itself (a situation analogous to lunar eclipses at the Earth). ...

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• Partial Solar Eclipse May 2003
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The apparent path of the Sun across the sky. ... The path of the Sun across the celestial sphere is very close to that of the planets and the moon. ... In one year, as the Earth completes a full circuit around the Sun (drawing above), the Earth-Sun line and its continuation past Earth sweep the entire plane. ... Since the Sun and Earth are in the plane of the ecliptic, the line is automatically in that plane too; if the moon is also on the same line, it must be in the plane of the ecliptic as well. ...

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• Discovery of the Solar System
• The Sky Above Us

... 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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... This year's eclipse is unique in duration. ... Although, at the present time, there are 6 solar observatories belonging to leading space agencies in orbit around the Earth, the eclipse of 22 July, 2009, will only be seen by two of them: the Russian CORONAS-PHOTON satellite equipped with TESIS telescopes and Japan's HINODE satellite fitted with an XRT space telescope. ... TESIS will be the first of the two devices (and the very first on Earth) to witness the solar eclipse. ...

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• The X-ray Solar Eclipse
• Project's diary
• The culmination of the solar eclipse coincided with the strongest magnetic

... Venus Falls Out of the Evening Sky . 3.09.1999 . Orbiting closer to the Sun than planet Earth, bright Venus always appears to be near the Sun's position in our sky and often shines near the horizon in twilight hours. ... Eclipse Over The Mountain . ... Symbiotic Star Bubbles . ... The two stars at the center of this nebula are very different. One is a white dwarf star with a mass similar to our Sun but with a radius as small as our Earth. ... Reflections on NGC 6188 . ... 1999 2000 . ...

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Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . Sun . Moon . ... March . ... A partial solar eclipse seen from Minneapolis, Minnesota, USA on 20 May 21012. Image credit: T. Ruen via wWikimedia.org . ... March also brings around the rare spectacle of a total solar eclipse on the 20 th . ... Jupiter meets the Crab in the March sky (image credit: Samantha Steed/Armagh Planetarium/Stellarium) . ... Image credit: Samantha Steed/Armagh Planetarium/Stellarium) . ...

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• Viewing the Partial Solar Eclipse of 20 March 2014 | Astronotes
• Astronotes | Armagh Planetarium's astronomy news from across the Universe -
• Rings Around an Asteroid | Astronotes

... The Magazine . ... Observing . ... Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... stars . ... Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . Springtime observing for small telescopes . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Click here to receive a FREE e-Guide exclusively from Astronomy magazine. ... Astronomy Magazine . ...

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• Everything around us is spinning: particles, planets, stars, galaxies. Why not
• Would it be possible to find a moon around an extrasolar planet? If so, how? |
• Tatooine-like planet discovered | Astronomy.com

... 2010 January 22 . Millennium Annular Solar Eclipse . ... Explanation: The Moon's shadow raced across planet Earth on January 15 . Observers within the central shadow track were able to witness an annular solar eclipse as the Moon's apparent size was too small to completely cover the Sun. A visually dramatic ring of fire , the annular phase lasted up to 11 minutes and 8 seconds depending on location, the longest annular solar eclipse for the next 1,000 years . ... About APOD | ...

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• APOD: 2009 July 18 - Planets, Great Wall, and Solar Eclipse
• APOD: 2014 April 26 - Southern Annular Eclipse
• APOD: 2011 June 18 - Lightning Eclipse from the Planet of the Goats

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

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• http://www.aaa.org/s932/images/aaaclassapr2010_1.pdf

My research efforts have focused on three areas which are: . More than 200 extrasolar planets have been discovered around relatively nearby stars, primarily through the Doppler line shifts owing to the reflex motions of their host stars, and more recently through transits of some planets across the face of the host stars. ... Gravitational microlensing provides a novel technique to look for planets around lens stars, and this is the only technique currently capable of detecting Earth-mass planets. ...

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• John H. Debes
• PSF Variations with Field Position
• CCD Position and Orientation on Sky

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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• Total Lunar Eclipse May 15-16 - an Astronomy Net Observation_reports Forum
• Solar Eclipses At Sea - Ted Pedas Associates, AstroGuide Listing
• Astronomy Terms - To Help You Study The Universe - an Astronomy Net Article

... Bad Astronomy . ... This first Snack of the year 2000 (yes, I am one of those who says the Millennium begins in 2001) will talk a little about a wonderful event: a total lunar eclipse. On the evening of Thursday, January 20 (or the early morning Friday, January 21 if you lives east of England) the Moon will go undergo one of the best eclipses it can. ... The Moon stays in the Earth's shadow in a lunar eclipse longer the Earth stays in the Moon's shadow during a solar eclipse. ... 2008 Phil Plait. ...

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• Phil Plait's Bad Astronomy: Misconceptions
• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: Misconceptions: Does the Venus Transit Cause...

... General information . ... Staff . Research staff . ... Information . ... Historical highlights . Historical research . ... This process is thought to occur in circumstellar disks of gas and dust around young stars on rather short timescales : infrared surveys show that the number of low mass stars with disks drops dramatically for stars older than 10 Myr, suggesting that in order to form large solids before the disk disperses, the growth process has to take place within a few million years. ...

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• Educator's Guide to Eclipses
• INAF - Arcetri Astrophysical Observatory
• The Discovery of the Galilean Satellites

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

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• ASP: Up, Up, and Away
• ASP: The Upcoming Total Solar Eclipse!
• ASP: Indiana Jones and the Astronomers of Yore

Contents. planet: 5 - Jupiter satellites: J1 - Io : 10, J3 - Ganymede : 15, J4 - Callisto : 6 total number: 31 type: relative dates: 1997-1997 observatory: see observatories list in the relevant article. ... Emelianov N. V., Vashkovjak S. N. (2009) Astrometric results of the observations of the mutual occultations and eclipses of the Galilean satellites of Jupiter in 1997. ... Position angle A in degrees (topocentric for mutual occultation or heliocentric for mutual eclipse) 10. ...

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• jg0036
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... For a long time we've known that planets form and live around stars. ... When a star is born, any leftover gas and dust forms a disc around it, similar to Saturn's rings. Within this disc, small dust grains made of rock sometimes form. ... Now, for the first time ever astronomers have spotted solid grains in the gassy disc around a 'brown dwarf' an object that is neither a planet nor a star. ... Astronomers didn't expect to find these solid grains around brown dwarfs for a number of reasons. ...

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• http://www.eso.org/public/news/eso1245/kids/
• http://www.eso.org/public/news/eso1435/kids/
• http://www.eso.org/public/news/eso1436/kids/

... 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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• az encoder1 fail
• rotaPlatToSky
• on,off position switching offsets

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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... 8, ``Celestial Mechanics'', 2002 Regularity and chaos for planetary orbits in binaries D. Benest Observatoire de Nice, Nice, France 1. ... Previous papers showed that stable planetary orbits, around either the lightest or the heaviest component of several nearby binary systems, exist up to distances from their primary of the order of more than half the binary's periastron sep­ aration. ... Chaos: bounded or sticky? It is now well­known that planetary dynamics may include some proportion of chaos. ...

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• AY2006 (preface)
• AY2012 (contents)
• Supplemental information