... 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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The laws of orbital motion are mathematical, and one cannot explore them without some mathematics. ... Straight line : . ... The distance of the line from the origin thus fluctuates between a(1 - e) and a(1 + e) , and the result is a flattened circle or ellipse ; the point O (the origin) is its focus . ... We can now state Kepler's law more precisely as "the square of the orbital period T is proportional to the cube of the semi-major axis of its orbit around the Sun." ... Kepler's first law was: . ...

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• Earth [Oulu]
• The Principle of the Rocket
• Dynamics of Pluto

... There has been a heated public discussion in the past few years about whether our ninth planet is really deserving of the name. Since Pluto orbits a star, and is much less luminous, it certainly satisfies the definition we have above. The problem is actually not with Pluto, but with a very large number of other bodies in our Solar System which also satisfy this definition, but which are not called planets. Perhaps the most notable of these is Ceres, the largest asteroid. ... Planet . ...

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• ASP: Up, Up, and Away
• ASP: The topsy-turveying of planets, stars, and lava lamps
• ASP: The Music of the New Spheres?

. Aristarchus was extremely clever and also figured out a way to determine the ratio of distances between the earth and the moon and the earth and the sun. While wrong, at least he reasoned that the sun was much farther from the earth than the moon. Just Try and Follow this! . Summary of Greek Science .

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• http://zebu.uoregon.edu/51peg.html
• The Three Planet System
• All about Jupiter

... 9a. Earth orbits Sun? . ... Kepler's Laws . ... and First Law . ... Such " polar coordinates " ( drawing on the left, below) are the ones best suited for describing planetary motion. ... All planetary orbits resemble ellipses, each with its own value of e or eccentricity : the smaller e is, the closer the shape to a circle. ... We can now state Kepler's law more precisely as "the square of the orbital period T is proportional to the cube of the semi-major axis a of its orbit around the Sun." ...

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• Kepler's First Law--Lesson Plan #20
• Inventory
• Trigonometry beyond 90 degrees

... 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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• Planets, orbits, and comets are somewhat round. Is there an underlying
• Can you explain Mercury's retrograde motion? Do other planets appear to do this
• Bright planets meet at dusk | Astronomy.com

Just beyond the main asteroid belt there exists a population of small objects orbiting the Sun at the same heliocentric distance of Jupiter. The combined action of Jovian and Solar gravity creates a stable dynamical haven for these objects near the so-called Lagrangian equilibrium points, in honour to the French mathematician Joseph Louis Lagrange who first demonstrated their existence and stability. ... Soon after its discovery it was realized that this asteroid is, in fact, a Mars Trojan. ...

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• Armagh Observatory
• Armagh Astropark: The Planets
• Planetary Systems Research at Armagh

... AMPLE (Adaptable Minor Planet Ephemerides) is integrated software package to deal with a number of problems concerning minor planets with the aid of IBM-type personal computer. ... compiling a list of all numbered minor planets which can be seen at certain moment within specified sky region and visualization of their mutual positions; . ... As AMPLE is able to reproduce virtually any table of "the Ephemerides of Minor Planets" , it may be considered as computer version of the EMP. ...

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• (Untitled)
• AY2016 (contents)
• AY2014 (contents)

... A Radar Image of Planet Earth . ... Credit: NASA , JPL Imaging Radar Program Explanation: This image of Mt. Rainier, Washington USA, planet Earth , was produced by the Spaceborne Radar Laboratory which flew on the Space Shuttle Endeavour in 1994. ... During the early 90s, NASA's Magellan spacecraft was able to use radar imaging to produce similar high resolution maps of the surface of Venus . ... Publications with keywords: Earth - radar . Publications with words: Earth - radar . ...

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• Астронет > A Radar Image of Planet Earth
• Астронет > 2003 UB 313: A Tenth Planet?
• Pleiades, Planets, And Hot Plasma

Astronomy Discussion Forums . Forums: . ... Discussion Forums . ... Gravity Of Planets Mass . Forum List | ... Post Message | ... Login to Post . ... www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

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• Pluto Is Not A Planet, But A Moon Of Neptune. - an Astronomy Net God Science
• Astronomy articles, forums, listings, and other resources about Astronomy.
• Astronomy Terms - To Help You Study The Universe - an Astronomy Net Article

... Bad Astronomy . ... Bitesize Astronomy . ... The Nine Planets . ... It isn't the first extrasolar planetary system to be discovered; the first planet outside our own solar system orbiting a normal Sunlike star was discovered in 1995. ... Still, this is the first solar system ever found besides our own to definitely have more than one planet. This is an important discovery: most people all along have been assuming that multiple planet systems exist, but we had never actually seen one. ...

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• Phil Plait's Bad Astronomy: Misconceptions: Planet X and Orbital Math
• Phil Plait's Bad Astronomy: Misconceptions: Planet X
• Phil Plait's Bad Astronomy: Mad Science

Jupiter is the largest of the nine planets, more than 10 times the diameter of Earth and more than 300 times its mass. ... The mean density of Earth is 5.245 times that of water. The pull of gravity on Jupiter at the top of the clouds at the equator is 2.4 times as great as gravity's pull at the surface of Earth at the equator. ... It is tipped about 11њ to Jupiter's axis of rotation, similar to Earth's, but it is also offset from the center of Jupiter by about 10,000 kilometers (6,200 miles). ...

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• Sun, Planet and Satellite Data
• Neptune's Moon Larissa
• Planetary Data Browser

Discover the cosmos! ... 2005 August 1 . 2003 UB 313 : A Tenth Planet? ... Explanation: Has a tenth planet been discovered? A newly discovered object , designated 2003 UB 313 and located more than twice the distance of Pluto , is expected to be at least as large as Pluto and probably larger, given current measurements. ... If so, and if some are found closer in than 2003 UB 313 , it may be premature to call 2003 UB 313 the tenth planet. ... About APOD | ... NASA Official: Jay Norris. ...

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• APOD: 2000 May 24 - Pleiades, Planets, And Hot Plasma
• APOD: August 24, 1995 - A Radar Image of Planet Earth
• APOD: June 26, 1998 - A Planet For Gliese 876

. Previous slide . Next slide . Back to first slide . View graphic version .

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• Surface Gravity
• Key formulae
• Planet Pictures

... 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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• Planetary Radar: Arecibo Radar Images of Planets
• byu phased array feed.

... Subject of Astronomy. ... Basis of Spherical and Practical Astronomy. ... Celestial Sphere. ... Changes of Star's Coordinates as a Result of Daily Rotation of Celestial Sphere. ... Time Measuring. ... Changes of Solar Equatorial Coordinates. ... Stellar Day, Stellar Time. ... Real Solar Time. ... Mean Solar Time. ... Connections between Stellar and Mean Time. ... Apparent Path and Configuration of Planets. ... Ways of Energy Transportation to Stellar Surface.Basis of Spectral Analysis. ... Solar...

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• Introduction to Astronomy
• Explanations to ephemeris for physical observation of the planets for Computer

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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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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• 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

... Space Telescope Science Institute and Johns Hopkins University . A multidisciplinary course exploring the origins of life, planetary formation, Earth's evolution, extrasolar planets, habitable zones, life in extreme environments, the search for life in the Universe, and space missions. DiRuggiero, Norman, and others, 3 credit hours. ... The JHU Department of Earth and Planetary Sciences also offers courses that may be of interest to students interested in astrobiology: . ...

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• Planet Finder Options I: Linear Nulling Arrays for Studying Earth-Like Planets
• Registration: Planets Beyond the Solar System
• Evolutionary Models of Extra-Solar Giant Planets and Brown Dwarfs

... CONTACT . ... Planned space experiments promise a considerable increase in the detections and statistical knowledge arising especially from transit and astrometric measurements over the years 2005­15, with some hundreds of terrestrial-type planets expected from transit measurements, and many thousands of Jupiter-mass planets expected from astrometric measurements. ... To request a printed copy, please contact Britt Sjoeberg (bsjoeber@eso.org) . ...

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• ESLAB 2007