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Planet
[ Planet ]

·Astronomy: Planet - THE VIKINGS
·Astronomy: Planet - THE PIONEER SPIRIT
·Astronomy: Planet - MARINER MISSIONS
·Astronomy: Planet - THE FIRST JOURNEYS
·Astronomy: Planet - TO THE PLANETS
 

 
 
Astronomy & Telescope Astronomy: Planet

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  Planet Planet: Astronomy: Planet - THE VIKINGS

THE VIKINGS

In the middle to late 1970s, the United States embarked on a bold exploration of the outer Solar System. It began with the Viking probes, two identical spacecraft sent to Mars in the middle 1970s.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:51:03 CST (6 reads)
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  Planet Planet: Astronomy: Planet - THE PIONEER SPIRIT

THE PIONEER SPIRIT

The United States reached farther out into the Solar System with the Pioneer launches in 1972 and 1973. Pioneer 10 made the first flyby of Jupiter on 4 December 1973. Its closest pass was within about 80,000 miles (130,000 km) of the cloud tops. The photos it relayed showed Jupiter's churning atmosphere, including the Great Red Spot, and three of the planet's four large moons—Europa, Ganymede, and Callisto.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:49:42 CST (5 reads)
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  Planet Planet: Astronomy: Planet - MARINER MISSIONS

MARINER MISSIONS

While the Soviets were busy with Venus, United States scientists were conducting a series offlybys of the planet Mars. Mariner 4 was launched in November 1964 and yielded a total of 22 photographs that revealed a heavily cratered terrain. Mariners 6 and 7 produced 201 photos, including the first close-up views of a Martian polar cap.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:48:51 CST (6 reads)
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  Planet Planet: Astronomy: Planet - THE FIRST JOURNEYS

THE FIRST JOURNEYS

Venus, the closest planet and a sister world to Earth, being similar in size and mass, beckoned as a reasonable and pragmatic first objective. Success, however, was literally hit and miss. Venera 1, launched by the Soviets on 12 February 1961, failed when radio contact was lost two weeks after launch.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:48:05 CST (6 reads)
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  Planet Planet: Astronomy: Planet - TO THE PLANETS

TO THE PLANETS

Even before the first person was put in orbit, space visionaries were looking to more distant and tantalizing horizons—the planets.

 
 
  Posted by astronomy on Saturday, December 04 @ 17:47:14 CST (6 reads)
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