Clue: 1961 earth orbiter

Answer: ENOS

Length: 4

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Similar Clues:

• Nonhuman Earth orbiter of 1961 (ENOS with 4 letters)
• Earth orbiter through much of the 1970s (SKYLAB with 6 letters)
• Former Earth orbiter (MIR with 3 letters)
• Earth orbiter until 2001 (MIR with 3 letters)
• U.S.-launched orbiter that photographs the earth's surface (LANDSAT with 7 letters)
• Earth orbiter from 1986 to 2001 (MIR with 3 letters)
• Earth orbiter for about 15 years (MIR with 3 letters)
• Earth orbiter (e.g. MIR with 3 letters)
• First earth orbiter (GLENN with 5 letters)
• Earth-bound comet, perhaps? (ASTRODOOM with 9 letters)