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Topic: Hyperion (moon)


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In the News (Mon 24 Jun 19)

  
  Encyclopedia article: Hyperion (moon)   (Site not responding. Last check: 2007-11-07)
Hyperion is red (The quality or state of the chromatic color resembling the hue of blood) der than Phoebe and closely matches the color of the dark material on Iapetus.
Hyperion is the only known moon in the solar system that rotates chaotically but simulations seem to indicate that other irregular satellites may have done so in the past.
Hyperion is unique among moons in that it is very irregularly shaped, has a fairly eccentric orbit, and is near another large moon (Titan ((Greek mythology) any of the primordial giant gods who ruled the Earth until overthrown by Zeus; the Titans were offspring of Uranus (Heaven) and Gaea (Earth))).
www.absoluteastronomy.com /encyclopedia/h/hy/hyperion_(moon).htm   (712 words)

  
 Hyperion (moon) - Wikipedia, the free encyclopedia
Hyperion (hye-peer'-ee-un, Greek ‘Υπερίων) is a moon of Saturn discovered by William Cranch Bond, George Phillips Bond and William Lassell in 1848.
Hyperion is one of the largest highly irregular (non-spherical) bodies in the solar system (second to Proteus).
Hyperion is the only known moon in the solar system that rotates chaotically, but simulations suggest that other irregular satellites may have done so in the past.
en.wikipedia.org /?title=Hyperion_(moon)   (606 words)

  
 Saturn's Moon Hyperion
The moon's rotational period is not constant and varies from one orbit to the next.
Scientists believe that the spongy appearance of Hyperion is caused by a phenomenon called thermal erosion, in which dark materials accumulating on crater floors are warmed by sunlight and melt deeper into the surface, allowing surrounding ice to vaporize away.
This image of Hyperion was acquired by the Voyager 2 spacecraft on August 25, 1981.
www.solarviews.com /eng/hyperion.htm   (1292 words)

  
 [No title]
I think Hyperion is the most interesting Titan because he was one of the original twelve titans, the oldest Titan, and was the original sun god.
Hyperion is my favorite titan because we were are both the oldest child in the family.
Hyperion was the titan of the sun, and his name means " he who goes before the sun." He is sometimes called the "Titan of Light" and the father of the sun, moon, and dawn.
www.ballpoint.org /greekgods/hyperion.htm   (104 words)

  
 Hyperion
Hyperion moves at a mean distance of 1.48 million km from Saturn and is strongly influenced by nearby Titan.
Hyperion is the only known body in the Solar System that rotates chaotically, though simulations indicate that other irregular satellites may have behaved this way in the past.
Hyperion’s strange spin probably accounts for the fact that Hyperion’s surface is more or less uniform, in contrast to many of Saturn’s other moons which have distinctly different leading and trailing hemispheres.
www.daviddarling.info /encyclopedia/H/Hyperion.html   (455 words)

  
 Hyperion
In Greek mythology Hyperion was a Titan, the son of Gaea and Uranus and the father of Helios.
But unlike most of Saturn's moons, Hyperion has a low albedo (.2 -.3) indicating that it is covered by at least a thin layer of dark material.
Hyperion is unique in that it is very irregularly shaped, has a highly eccentric orbit, and is near another large moon (Titan).
seds.lpl.arizona.edu /billa/tnp/hyperion.html   (342 words)

  
 HYPERION: Sun Moon, Dawn   (Site not responding. Last check: 2007-11-07)
Hyperion is a Titan and a son of Uranus and Gaia.
The name Hyperion means "he who goes before the sun" and may have arisen because he was sometimes thought of as the sun.
Hyperion is the Titan of light, the father of the sun, the moon, and the dawn.
www.waltm1.net /hyperion.htm   (66 words)

  
 TPS: Saturn's moon Hyperion   (Site not responding. Last check: 2007-11-07)
Hyperion's self-gravity is not enough to crush its materials together and eliminate gaps in its interior.
Hyperion and Titan are in a 4:3 orbital resonance, which means that Titan orbits Saturn 3 times for every 4 times Hyperion orbits.
Hyperion is both rounded and angular, dark, and covered completely with scars and craters.
www.planetary.org /saturn/hyperion.html   (465 words)

  
 Cassini-Huygens: Multimedia-Images
Hyperion's irregular dimensions are 164 by 130 by 107 kilometers (102 by 81 by 66 miles).
Hyperion is close to the size limit where, like a child compacting a snowball, internal pressure due to the moon's gravity will begin to crush weak materials like ice, closing pore spaces and eventually creating a more spherical shape.
However, this moon has a very irregular shape and preliminary estimates of its density show that it is only about 60 percent as dense as solid water ice.
saturn.jpl.nasa.gov /multimedia/images/image-details.cfm?imageID=1596   (512 words)

  
 Astronomy News
Saturn's chaotically tumbling moon Hyperion was captured by the Cassini spacecraft.
Hyperion's unusual dimensions are 164 by 130 by 107 kilometres.
The moon's spongy-looking exterior is an interesting coincidence, as Hyperion's density seems to indicate that it is porous and much of its interior is filled with voids.
www.activeboard.com /forum.spark?forumID=58381&subForumID=163878&action=viewTopic&commentID=2915300   (856 words)

  
 Hyperion Records Home Page
Founded in 1980, Hyperion is an independent British classical label devoted to presenting high-quality recordings of music of all styles and from all periods from the twelfth century to the twentieth.
Hyperion was one of the Titans, and the father of the sun and the moon — and also of the Muses, so we feel we are fulfilling his modern role by giving the art of music to the world.
The repertoire available on Hyperion, and its subsidiary label Helios (Helios, the sun, was the son of Hyperion), ranges over the entire spectrum of music — sacred and secular, choral and solo vocal, orchestral, chamber and instrumental — and much of it is unique to Hyperion.
www.hyperion-records.co.uk /top.html   (657 words)

  
 Natural satellite Article, Naturalsatellite Information   (Site not responding. Last check: 2007-11-07)
Most moons are assumed to have been formed out of the same collapsing region of protoplanetary disk that gave rise to its primary.
Several moons are thought to be captured foreign objects,fragments of larger moons shattered by large impacts, or (in the case of Earth's Moon) aportion of the planet itself blasted into orbit by a large impact.
Most moons in the solar system are tidally locked to their primaries;an exception is Saturn 's moon Hyperion, which rotates chaotically due to a variety of external influences.
www.anoca.org /moons/moon/natural_satellite.html   (398 words)

  
 Discovery Channel :: News :: Meet Saturn's 'Spongy' Anti-Moon   (Site not responding. Last check: 2007-11-07)
The closest ever peek at one of Saturn's smaller moons is revealing an airless, tumbling "spongy" pile of ice, less dense than a snowball and possibly riddled with caves and other voids.
When Hyperion is struck, a crater is formed from the impact and debris is ejected skyward.
That's different from most other moons, which sweep up most of their own messes on subsequent orbit and so lose little mass in the end.
dsc.discovery.com /news/briefs/20050711/hyperion.html   (479 words)

  
 [No title]   (Site not responding. Last check: 2007-11-07)
Hyperion's ancient surface is covered in impact craters.
Saturn's satellite Hyperion has just been buzzed by the Cassini probe, and the stunning pictures that it sent to Earth earlier this week are beginning to reveal the moon's turbulent history.
He points out that the tiny outer moons could not release enough material to produce more than a light dusting on Hyperion, yet images of some relatively recent craters show that the dark stuff may be metres thick.
www.nature.com /news/2005/050926/pf/050926-15_pf.html   (608 words)

  
 New Scientist SPACE - Breaking News - Cassini flyby of Hyperion reveals tortured world
Hyperion is potato-shaped: 360 kilometres long, but only about 250 kilometres across.
And it is exceptionally dark for a Saturnian moon, reflecting only 30% of the light that falls on it, with a distinctly red tint.
One theory is that it is merely a fragment of a larger moon that was shattered in a violent impact.
www.newscientistspace.com /article.ns?id=dn8065&feedId=space_rss20   (342 words)

  
 Zoom Astronomy Glossary: H
It is sometimes called a quarter moon (this moon has completed one quarter of an orbit around the Earth from its full or new position, and one quarter of the moon's surface is visible from Earth).
Helene is one of the smaller of the 18 moons of Saturn.
Hyperion is one of the 18 moons of Saturn.
www.enchantedlearning.com /subjects/astronomy/glossary/indexh.shtml   (3033 words)

  
 Hyperion   (Site not responding. Last check: 2007-11-07)
Hyperion is the 3rd farthest moon from Saturn, with a standoff distance of 1,481,000 km.
Hyperion is the 3rd farthest moon from Saturn.
Hyperion is about the size of a large county or small state.
www.windows.ucar.edu /saturn/moons/hyperion.html   (275 words)

  
 Hyperion --  Encyclopædia Britannica   (Site not responding. Last check: 2007-11-07)
Hyperion orbits Saturn once every 21.3 days at a distance of 1,482,000 km (918,840 miles), between the orbits of the major satellites Titan and Iapetus.
The largest of Saturn's moons is Titan, intermediate in size between the planets Mercury and Mars.
It is the only moon in the solar system known to have a dense atmosphere.
www.britannica.com /eb/article-9041800   (712 words)

  
 International Cassini Mission Photographs Two Saturn Moons
Images of Hyperion show a surface dotted with craters and modified by an unknown process to create a strange, "spongy" appearance, unlike the surface of any other Saturn moon.Hyperion has a reddish tint when viewed in natural color.
Hyperion is 266 kilometers across, has an irregular shape and spins in a chaotic rotation.
Images of Hyperion taken on Sept. 26 show a surface dotted with craters and modified by some process, not yet understood, to create a strange, "spongy" appearance, unlike the surface of any other Saturn moon.
www.globalsecurity.org /space/library/news/2005/space-050930-usia01.htm   (951 words)

  
 Hyperion compared to the Moon   (Site not responding. Last check: 2007-11-07)
Hyperion is 1.27 times the diameter of Phoebe (a satellite of Saturn).
Hyperion is 1.82 times the diameter of Puck (a satellite of Uranus).
Hyperion is 8.6 times the diameter of Helene (a satellite of Saturn).
ic-www.arc.nasa.gov /projects/bayes-group/Atlas/size/Hyperion/Moon.html   (145 words)

  
 JPL.NASA.GOV: News Releases
Hyperion is decidedly non-spherical and its unusual shape is easy to see in the movie, which was acquired over the course of two and a half days.
Jagged outlines visible on the moon's surface are indicators of large impacts that have chipped away at its shape like a sculptor.
Hyperion is close to the size limit where, like a child compacting a snowball, internal pressure due to the moon’s own gravity will begin to crush weak materials like ice, closing pore spaces and eventually creating a more nearly spherical shape.
www.jpl.nasa.gov /news/news.cfm?release=2005-114   (381 words)

  
 NASA's Solar System Exploration: Planets: Saturn: Moons: Hyperion
Hyperion [hi-PEER-ee-en] is the largest irregularly shaped natural satellite ever observed, even though it is one of the smaller moons of Saturn.
It is likely that Hyperion may have been bombarded with meteors, which blew part of this moon away and caused its highly irregular shape.
The largest crater on its surface is approximately 120 kilometers (75 miles) in diameter and 10 kilometers (6 miles) deep.
solarsystem.nasa.gov /planets/profile.cfm?Object=Hyperion   (162 words)

  
 McGraw-Hill AccessScience: Saturn   (Site not responding. Last check: 2007-11-07)
To place this complex system in perspective, the mean distance from the Earth to its Moon is 240,000 mi (384,000 km), so Saturn and its rings (except for the outer edge of the E ring) would just fit in the space between the Earth and the Moon.
All of these satellites except Hyperion and Phoebe appear to keep the same hemisphere facing Saturn as they revolve around it, meaning that their rotational periods are equal to the periods of revolution as a result of tidal frictions, just as is the case for the Moon.
Hyperion exhibits an aperiodic, "chaotic" rotation, which, with its irregular shape, may be an indication of a relatively recent collision.
www.accessscience.com /Samples/Article   (4028 words)

  
 Math Trek: Chaotic Moon, Science News Online, Oct. 15, 2005   (Site not responding. Last check: 2007-11-07)
Hyperion's strangeness wasn't evident when the satellite was first identified in 1848.
What we now call Hyperion may be merely the biggest chunk left over from a massive catastrophic impact that left the satellite a scarred, craggy shadow of its former self.
Because the chaotic zone surrounding the 4:3 resonance between the orbital periods of Hyperion and Titan is so vast, the chance that the satellite's orbit will ever reach one of the few small islands of stability in the vicinity appears minimal.
www.sciencenews.org /articles/20051015/mathtrek.asp   (1057 words)

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