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Window of Universe
[ Window of Universe ]

·Astronomy: Window of Universe - RADIO SIGNALS
·Astronomy: Window of Universe - MILLIMETER WAVES
·Astronomy: Window of Universe - THE LOW END
·Astronomy: Window of Universe - Karl Jansky-KARL JANSKY'S STATIC FROM SPACE
·Astronomy: Window of Universe - THE HIGH END
·Astronomy: Window of Universe - OTHER WINDOWS ON THE UNIVERSE
 

 
 
Astronomy & Telescope Astronomy: Mars

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  Mars Mars: Astronomy: Mars Mission - WHERE TO FROM HERE

WHERE TO FROM HERE?

If just some of the dreams of the science visionaries come true, the next century promises to bit a bold new era of exploration and discovery in astronomy.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:47:07 CST (9 reads)
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  Mars Mars: Astronomy: Mars - A WETTER PAST

A WETTER PAST

Running water, lakes, possibly rain, a warmer climate, and a thicker atmosphere—ancient Mars might well have been remarkably Earth-like. So what happened? Two things are the keys to understanding present-day Mars.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:46:01 CST (9 reads)
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  Mars Mars: Astronomy: Mars - WAR OF THE WORLDS

WAR OF THE WORLDS

On the evening of 31 October 1938, radio producer Orson Welles broadcast a version of the H. G. Wells novel, The War of the Worlds. The novel tells of a Martian attack on London. It was published in 1897, at a time of enormous public interest in Mars, occasioned by recent close oppositions.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:45:11 CST (8 reads)
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  Mars Mars: Astronomy: Mars - A VARIABLE PLANET

A VARIABLE PLANET

With the Moon, a look through any telescope tends to instantly impress. Mars, on the other hand, is a planet with delicate, elusive features, and the experienced eye will see much more than the beginner's. Mars has a great many features, but you will not catch them all on your first night's viewing. Experience is crucial, and the key to getting the most out of your observations of Mars is to view the planet as many times as you can.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:44:26 CST (9 reads)
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  Mars Mars: Astronomy: Mars - Sketching Mars-CAPTURING MARS

CAPTURING MARS

Sketching Mars is relatively easy. Many observers use standard-size blank forms— for example, 2 inches (50 mm) to the Martian diameter— but these are too large for times when the Martian disk is small. They will tempt you to put down details you cannot really see.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:43:42 CST (8 reads)
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  Mars Mars: Astronomy: Mars - Red Planet-THE WAYWARD RED PLANET

THE WAYWARD RED PLANET

The Red Planet and its motions challenged every astronomer from antiquity onward. By the late 1500s, the Danish astronomer Tycho Brahe (1546-1601) had amassed decades of observations of Mars and the other planets. His observations were by far the most accurate to date, yet he failed to weld them into a coherent system of the universe.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:42:50 CST (9 reads)
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  Mars Mars: Astronomy: Mars - Observation-OBSERVING MARS

OBSERVING MARS

On first viewing Mars through a telescope, beginners are struck by how small it appears.| The planet is only half the of Earth and, even at favorable oppositions, it appears no larger than a lunar crater. views typically show an disk, a few faint markings, perhaps a whitish polar cap. The most powerful telescopes on Earth give views of Mars only about as detailed as naked-eye views of the Moon.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:41:57 CST (9 reads)
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  Mars Mars: Astronomy: Mars - MARTIAN SEASONS

MARTIAN SEASONS

If you observe Mars from one opposition to another, you can see the Martian weather and seasons change. Mars has a tilt similar to Earth's and experiences four seasons, each lasting about twice as long as ours because Mars's orbit is that much larger.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:41:08 CST (7 reads)
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  Mars Mars: Astronomy: Mars - THE MARTIAN CYCLE

THE MARTIAN CYCLE

Depending on when you look at it, Mars's apparent size can vary greatly—from 4 to 25 arc-seconds. A typical apparition begins with Mars low in the east in the glow of morning twilight. As weeks pass, the planet grows. It moves eastward against the stars and does not rise out of the dawn quite as quickly as they do. Earth, , orbiting faster than Mars, begins to overtake it, and Mars's apparent eastward motion slows and stops.

 
 
  Posted by astronomy on Saturday, December 04 @ 15:40:23 CST (7 reads)
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  Mars Mars: Astronomy: Mars - LIFE ON MARS

LIFE ON MARS?

Possible similarities between Earth and ancient Mars beg the question: if life emerged here, why not on Mars?

 
 
  Posted by astronomy on Saturday, December 04 @ 15:39:10 CST (5 reads)
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