Class

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Across
  1. 3. Space telescope launched in 1990 that revolutionized our view of the universe. (6 letters)
  2. 4. NASA spacecraft launched in 1977 that has traveled beyond the solar system. (7 letters)
  3. 5. First artificial satellite launched by the USSR in 1957. (8 letters)
  4. 7. Astronomer who used a telescope to confirm heliocentrism and discover Jupiter’s moons. (7 letters)
  5. 9. Mission that landed the first humans on the Moon in 1969. (8 letters)
Down
  1. 1. Scientist who formulated the laws of motion and universal gravitation. (6 letters)
  2. 2. First human in space, launched aboard Vostok 1 in 1961. (7 letters)
  3. 5. Soviet space program that carried cosmonauts to space starting in 1967. (5 letters)
  4. 6. Astronomer known for laws of planetary motion, and the space telescope named after him. (6 letters)
  5. 8. A multinational space station launched in 1998 for long-term research. (3 letters)