Satellites quiz
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Which country runs the GPS satellites?
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More questions about Satellites
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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What stops an orbiting satellite from crashing into Earth?
Answer: Sideways speed
Why: Isaac Newton pictured this with a cannonball fired from a mountaintop so fast that it falls all the way around Earth.
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Why do most satellite launches head east?
Answer: Earth's spin
Why: At the equator the ground already moves east at about 1,670 km/h, speed a rocket keeps for free.
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What was the world's first satellite navigation system?
Answer: Transit
Why: Transit relied on the Doppler shift of radio signals so submerged submarines could fix their position.
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Which way do satellite TV dishes in Europe point?
Answer: South
Why: TV satellites sit in geostationary orbit above the equator, which lies south of every part of Europe.
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What was NASA's 1960 communications satellite Echo 1?
Answer: A giant balloon
Why: About 30 m across, it simply bounced radio signals from one ground station to another.
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Which nation was third to launch a satellite on its own rocket?
Answer: France
Why: Britain and Canada reached orbit earlier, but used American rockets rather than their own launchers.
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