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Exploring-Space-Scramble

Answer Key:
1) Light pollution
2) observatory
3) orbit
4) project apollo
5) project gemini
6) project mercury
7) radio telescope
8) reflecting
9) refracting
10) satellite
11) space probe
12) space shuttle
13) space station
14) electromagnetic
15) frequency
16) radiation
17) magnetic waves
18) light speed
19) atmosphere
20) light waves