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A guide to Mars

Morę than 20 spacecraft have successfully explored Mars. They have flown by the planet, orbited around it, landed on it, and sent rovers across it.

The first close-up images were transmitted back to Earth in 1965, and today the entire planet has been mapped.

Duck Bay

Opportunity used its panoramie camera to take this view of Duck Bay, a relatively gentle siope on the edge of Yictoria Crater.

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Victoria Crater

The Mars rover Opportunity arrived at this 0.5-mile- (800-m-) wide impact crater in 2006 and spent almost two years exploring it.

Low Ridge

This image taken by Spirit in April 2006 shows dark volcanic rocks against the red soil on Low Ridge within Gusev Crater

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Endurance Crater

This 427-ft- (130-m-) wide impact crater was explored by Opportunity from May to December 2004.

(c) 2011 Dorling Kindersley. Ali Rights Reserved.