Assertion: indirect detection | /r/UsedFor | refer to the situation
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Source sentences:
text: b. Direct Detection is when the exoplanet is visible through a telescope, while indirect detection refers to the situation where an exoplanet cannot be seen, but its existence is inferred from the behavior of its host star.
text: c. Direct Detection is when we send spacecraft to nearby stars to look for planets while Indirect Detection refers to the situation whereby we look for exoplanets while remaining on Earth.