Caption for Viky

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Across
  1. 1. Earth is estimated to be 4.54 billion years old
  2. 2. Pluto is the tiny planet located in kuiper belt
  3. 5. Astronaut is a space explorer
  4. 7. In 1969,Neil Armstrong and Buzz Aldrin left their imprints on Moon
Down
  1. 1. Mercury is first planet in solar system order
  2. 3. distance between galaxies is measured in light years
  3. 4. the Digits of foot
  4. 6. Jupiter is the biggest planet of solar system