Definitions
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun apoapsis in orbit around the moon
Etymologies
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Examples
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Analogous expressions denoting the relations of the Projectile towards the Moon, would be _periselene_ and _aposelene_.
All Around the Moon Jules Verne 1866
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The nearest point of this orbit (periselene) lies at a distance of about 500 km from the moon's surface while the farthest point (aposelene) lies at about 7,500 km.
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After the lunar orbit insertion manoeuvre was done and Chandrayaan-1 achieved an aposelene of 7,502 km and a periselene of 504 km, ISRO executed a series of manoeuvres to reduce the spacecraft's orbit and bring it closer to the moon.
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On November 10, the SCC performed "a difficult manoeuvre" of steeply reducing the aposelene from 7,502 km to 255 km and the periselene from 200 km to 187 km.
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On Saturday (November 8), ISRO accomplished with aplomb the most crucial and critical manoeuvre of safely inserting Chandrayaan-1 into the lunar orbit with an aposelene of 7,502 km and a periselene of 504 km.
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Nov 11: Chandrayaan-1 moves into further lower orbit of 102-km periselene and 255-km aposelene.
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The nearest point of this orbit (periselene) lies at a distance of about 500 km from the Moon's surface while the farthest point (aposelene) is at about 7,500 km.
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The nearest point of this orbit (periselene) lies at a distance of about 500 km from the Moon's surface while the farthest point (aposelene) is at about 7,500 km.
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Nov 10: The spacecraft moves to 187 km from the moon (periselene) and 255 km away (aposelene), orbiting elliptically once in every 2 hours and 16 minutes over the polar regions of the moon.
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As a result, the farthest point of Chandrayaan-1's orbit (aposelene) from the Moon's surface was first reduced from 7502 to 255 km and then finally to 100 km.
PhysOrg.com - latest science and technology news stories 2008
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