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Card 6
Front
What do moons orbit ?
Back
Card 7
Front
What do planets orbit?
Back
Card 8
Front
Why do planets orbit stars?
Back
Card 9
Front
What is the source of the centripetal force?
Back
Card 10
Front
Explain further - 'moons orbit planets and planets orbit stars because centripetal force acts on them'...
Back
Card 11
Front
What are the advantages of unmanned probes?
Back
Card 12
Front
What are the disadvantages of unmanned space probes?
Back
Card 13
Front
What are some disadvantages of Spacecraft carring humans?
Back
Card 14
Front
Why do astronauts need to wear special spacesuits outside the spacecraft?
Back
Card 15
Front
What is a light year?
Back
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