Across
- 3. telescopes that collect radio waves and microwaves using an antenna that resembles a satellite dish.
- 6. Launched in 1977, has traveled beyond our solar system.
- 7. the first optical space-reflecting telescope that collects light at all wavelengths, giving us a clear view of the universe.
- 8. a telescope which uses a concave mirror to focus light.
- 9. the first artificial satellite launched by the Soviet Union in 1957.
Down
- 1. the study of life in the universe.
- 2. uncrewed spacecraft sent to explore distant objects in the solar system, like planets, moons, and comets.
- 3. propel themselves by ejecting exhaust gases, creating thrust that pushes them forward.
- 4. an object that orbits another object in space.
- 5. a telescope which uses convex lenses to concentrate light from distant objects