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Space Shuttle
[ Space Shuttle ]

·Astronomy: Space Shuttle - SPACE STATIONS
·Astronomy: Space Shuttle - THE CHALLENGER DISASTER
·Astronomy: Space Shuttle - SHUTTLES AND STATIONS
 

 
 
Astronomy & Telescope Astronomy: Venus

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  Venus Venus: Astronomy: Venus - TRANSITS OF VENUS

TRANSITS OF VENUS

Every 100 years or so, observers on Earth can watch Venus at inferior conjunction pass across the face of the Sun. These rare events are called transits of Venus, and they occur in a pair, 8 years apart. The jast two transits were in 1874 and 1882; the next two take place on 8 June 2004 and 6 June 2012. In 2004, Venus crosses the southern part of the Sun, and in 2012, the northern part.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:39:05 CST (9 reads)
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  Venus Venus: Astronomy: Venus - TELESCOPIC VENUS

TELESCOPIC VENUS

Ironically, the very brightness that makes Venus so easy to find works against the telescope user. Seen in your scope's eyepiece in a dark sky, Venus is too dazzling an object for good or even comfortable viewing. Experienced Venus-watchers observe at twilight—or in full daylight by offsetting the telescope from the Sun.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:37:45 CST (9 reads)
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  Venus Venus: Astronomy: Venus - PENCIL AND CAMERA

PENCIL AND CAMERA

The toughest part of sketching Venus is to avoid exaggerating its features, which are all of low contrast. Prepare sketch blanks ahead of time, using a standard scale, such as 1 mm per arcsecond, and checking the size of Venus in an almanac, magazine, or software.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:36:26 CST (7 reads)
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  Venus Venus: Astronomy: Venus - REPAVE THE PLANET

REPAVE THE PLANET

About 600 million years ago, something reset the goo-clock on Venus's surface, and nobody knows why or how. Impact craters are by far the most common landform in the Solar System, but Venus has less than a thousand of them.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:35:39 CST (10 reads)
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  Venus Venus: Astronomy: Venus - THE LAVA PLANET

THE LAVA PLANET

To peel away the clouds and map Venus's geological fea-tures, scientists used an imaging radar on a spacecraft named Magellan. Building on work by US and Soviet probes and Earth-based radar, Magellan inventoried a museum of volcanic features, completing its global survey in 1994.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:34:45 CST (8 reads)
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  Venus Venus: Astronomy: Venus - Impact-HAVING AN IMPACT

HAVING AN IMPACT

Like every planet, Venus lias been struck repeatedly by meteorites. The craters uncovered m Magellan's images show a spectrum of types. many tainiliar from other moons and planets.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:33:51 CST (9 reads)
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  Venus Venus: Astronomy: Venus - GREENHOUSE EFFECT

GREENHOUSE EFFECT

Spacecraft have also studied conditions above the ground. The atmosphere of Venus is 90 times heavier than Earth's. And with temperatures of about 890 degrees Fahrenheit (480° C), Venus has the Solar System's hottest surface.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:33:03 CST (11 reads)
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  Venus Venus: Astronomy: Venus - THE EVENING STAR

THE EVENING STAR

Venus circles the Sun once every 225 days. But because Earth is also moving, it takes 584 days before Venus re-appears in the same part of our sky. This makes the typical Venus apparition a far more leisurely business than Mercury's frantic scurry.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:32:19 CST (9 reads)
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  Venus Venus: Astronomy: Venus - CONTINENTAL DIVIDE

CONTINENTAL DIVIDE

The continents preserve some of Venus's oldest terrain—the tesserae. These regions, which include Ovda Regio, have undergone a phenomenal amount of folding and faulting. They look like islands of an older surface that escaped the volcanic flooding that covered most of Venus.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:31:12 CST (7 reads)
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  Venus Venus: Astronomy: Venus

VENUS

Venus is a planet of paradox. No other planet comes closer to or appears larger or brighter—but your telescope will show you nothing of its surface, thanks to a veil of globe-girdling clouds.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:30:18 CST (7 reads)
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