UNIVERSAL KNOWLEDGE

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Across
  1. 2. closest planet to the Sun
  2. 4. Explorers the rocket that found K2-138
  3. 7. James Webb's to be partner for exploring exoplanets
  4. 8. The abbreviation for Stratospheric Observatory for Infrared Astronomy
  5. 9. the amount of planets orbiting TRAPPIST-1
Down
  1. 1. has a double shadow on planets with two suns
  2. 3. the second brightest star
  3. 5. The abbreviation for Nation Aeronautics and Space Administration
  4. 6. the only planet in our solar system with rings
  5. 9. lets us live