HyperfieldReferences
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| Science | Astronomy & cosmology | |
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Earth observation | |
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Planetary science | |
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Solar physics & space weather | |
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Human spaceflight | |
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Telecommunications and navigation | |
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Technology demonstration and education | |
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Launch and reentry | |
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| Proposed | |
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| Cancelled | |
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| Failed | |
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Future missions in italics
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