Space

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Across
  1. 4. A branch of astronomy that uses the principles of physics and chemistry, which studies physical processes in astronomical objects such as stars, galaxies, exoplanets, etc.
  2. 6. An astronomical instrument designed to study the radiation of celestial objects.
  3. 9. The second largest planet of the solar system from the Sun.
  4. 10. Gravitationally bound system of stars, star clusters, interstellar gas and dust, dark matter, planets.
Down
  1. 1. The third largest planet in the solar system from the Sun.
  2. 2. The gas shell of a celestial body held near it by gravity.
  3. 3. Science that studies the structure, movement and development of celestial bodies.
  4. 5. An extended faintly luminous object in the night sky.
  5. 7. A hypothetical form of matter that does not emit electromagnetic radiation and does not directly interact with it.
  6. 8. - a period of time equal to the period of the Earth's rotation around its axis.