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| 2 | The Mars Environmental Survey project at JPL |   
| 4 | Command and Data Subsystem onboard a spacecraft |   
| 6 | A.K.A. the Red Planet |   
| 8 | the process of going into outer space; involves a countdown |   
| 9 | '_ _ _ _ _ _ _, we have a problem.' |   
| 11 | someone who is sent into space in a spacecraft |   
| 12 | how we are able to float in space |   
| 13 | Circles in parallel planes to that of the equator defining north-south measurements, also called parallels |   
| 15 | A spacecraft's pattern of controlled drift about an unstable Lagrange point (L1 or L2 for example) while in orbit about the primary body (e.g. the Sun) |   
| 17 | Great circles that pass through both the north and south poles, also called meridians |   
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| 1 | National Aeronautics and Space Administration |   
| 3 | way of travel through space, which can land on land |   
| 5 | Downlink from a spacecraft that immediately indicates the state of the spacecraft as being one of several possible states by virtue of the presence and/or frequency of the subcarrier |   
| 7 | way of travel through space, which can land on land or water |   
| 10 | where astronauts sent into outer space go |   
| 13 | liquid oxygen |   
| 14 | Acquisition Of Signal, used in DSN operations |   
| 16 | space telescope that was launched into low Earth orbit in 1990 |   
| 18 | International Cometary Explorer spacecraft |   
| 19 | Mother _ _ _ _ _ |   
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