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Orbit
hideIn physics, an orbit is the gravitationally curved path of one object around a point or another body, for example the gravitational orbit of a planet around a star.
Historically, the apparent motion of the planets were first understood in terms of epicycles, which are the sums of numerous circular motions. This predicted the path of the planets quite well, until Johannes Kepler was able to show that the motion of the planets were in fact elliptical motions.[citation needed] Isaac Newton was able to prove that this was equivalent to an inverse square, instantaneously propagating force he called gravitation.[citation needed] Albert Einstein later was able to show that gravity is due to curvature of space-time, and that orbits lie upon geodesics. This is the current understanding.
For more information about Orbit, read the full article at
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News tagged with orbit
Final launch of Ariane 5 GS completes busy year
Space & Earth / Space Exploration
Dec 21, 2009 |
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(PhysOrg.com) -- Last week, an Ariane 5 GS launcher lifted off from Europe’s Spaceport in French Guiana on a journey to place the French military reconnaissance satellite Helios-2B into Sun-synchronous polar ...
New structure could produce efficient semiconductor laser sources
Dec 14, 2009 |
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(PhysOrg.com) -- University of Wisconsin-Madison researchers have achieved a nanoscale laser structure they anticipate will produce semiconductor lasers in the next two years that are more than twice as efficient ...
Pioneering images of both martian moons (w/ Video)
Space & Earth / Space Exploration
Dec 11, 2009 |
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(PhysOrg.com) -- For the very first time, the martian moons Phobos and Deimos have been caught on camera together. ESA's Mars Express orbiter took these pioneering images last month. Apart from their ‘wow’ ...
Partial lunar eclipse will take place on 31st December
Space & Earth / Space Exploration
Dec 03, 2009 |
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(PhysOrg.com) -- In a lunar eclipse, the Earth, Sun and Moon are almost exactly in line and the Moon is on the opposite side of the Earth from the Sun.
Chang'E-1 has blazed a new trail in China's deep space exploration
Space & Earth / Space Exploration
Dec 01, 2009 |
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A huge amount of scientific data have been accumulated by the CE-1 lunar orbiter. Using laser altimeter data, Jinsong Ping and Qian Huang et al obtained improved 3D lunar topography, and based on this, they ...
Discovery of a Retrograde or Highly Tilted Extrasolar Planet
Nov 18, 2009 |
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Astronomers have found that the extrasolar planet HAT-P-7b has a retrograde or highly tilted orbit. Studying such planets is important in understanding the diversity of planetary systems and assessing current ...
GOES-P satellite preparing for launch in March 2010
Space & Earth / Space Exploration
Oct 16, 2009 |
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Just two months after the successful launch of the GOES-O spacecraft, now called GOES-14 in orbit, the NASA team removed the GOES-P spacecraft from storage and commenced its post storage testing. GOES-P is ...
Largest Ring Around Saturn Discovered
Oct 07, 2009 |
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(PhysOrg.com) -- NASA's Spitzer Space Telescope has discovered an enormous ring around Saturn -- by far the largest of the giant planet's many rings.
The Hot Saturn Exoplanet
Oct 02, 2009 |
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(PhysOrg.com) -- Of the roughly 350 known exoplanets (i.e., extrasolar planets), the one orbiting the star HD149026 is unique.
Ganymede makes big impression on Jupiter's auroral lightshows (w/ Video)
Sep 18, 2009 |
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(PhysOrg.com) -- Studies of features in Jupiter’s spectacular and rapidly changing aurorae have given new insights into the complex electromagnetic interactions between the giant planet and two of its innermost ...
New NASA temperature maps provide 'whole new way of seeing the moon'
Space & Earth / Space Exploration
Sep 17, 2009 |
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(PhysOrg.com) -- NASA's first-ever moon temperature-mapping effort has returned its first data.
Space station crew grabs new cargo ship from orbit
Space & Earth / Space Exploration
Sep 17, 2009 |
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(AP) -- A brand new Japanese space station cargo ship has arrived at its destination 225 miles above Earth.
New Transient Radiation Belt Discovered at Saturn
Space & Earth / Space Exploration
Sep 14, 2009 |
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Scientists using the Cassini spacecraft's Magnetospheric Imaging instrument (MIMI) have detected a new, temporary radiation belt at Saturn, located around the orbit of its moon Dione at about 377 000 km ...
Bad weather further stalls shuttle landing
Space & Earth / Space Exploration
Sep 11, 2009 |
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(AP) -- Bad weather in Florida has stalled space shuttle Discovery's landing once more.
Space shuttle dodges debris on way home to Earth
Space & Earth / Space Exploration
Sep 10, 2009 |
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(AP) -- NASA has moved the shuttle Discovery out of the way of a mystery piece of orbiting junk and is hoping for a scheduled landing on Earth.
