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28 February, 11:19

Which tool to study space is the LEAST expensive? A) satellite B) space probe C) ground-based telescope D) human space exploration

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  1. 28 February, 11:35
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    C ground based telescope. Think of the cost of fuel in all the other options to launch them into space. A telescope is effective here on Earth.
  2. 28 February, 11:37
    0
    C ground - based telescope
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