Universe

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Across
  1. 6. a natural luminous body visible in the sky especially at night
  2. 7. a large mass that move around a star
  3. 10. rotating neutron stars observed to have pulses of radiation
  4. 11. Something that is composed of particles that do not absorb, reflect, or emit light
  5. 12. It is the idea that the universe began as just a single point,
  6. 14. An exoplanet is any planet beyond our solar system.
  7. 17. cosmic snowballs of frozen gases, rock, and dust that orbit the Sun
  8. 20. Something like the moon, an object that moves around the earth
  9. 22. is the result of eruption of a very old dying star
  10. 23. a region at the centre of a galaxy that produces an extremely large amount of radiation.
  11. 24. Earth's only natural satellite
Down
  1. 1. They are stars that have used up all their hydrogen that they used for fuel
  2. 2. a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
  3. 3. a small rocky body orbiting the sun
  4. 4. a group of stars that make an imaginary shape in the night sky
  5. 5. a powerful and luminous explosion of a star.
  6. 8. a large planet mostly composed of helium and/or hydrogen.
  7. 9. a small body of matter from outer space that enters the earth's atmosphere
  8. 13. a place in space where gravity pulls so much that even light can not get out
  9. 15. is our huge collection of stars, dust and gas.
  10. 16. an enormous cloud of dust and gas occupying the space between stars
  11. 18. matter consisting of elementary particles which are the antiparticles of those making up normal matter
  12. 19. a huge collection of gas, dust, and billions of stars and their solar systems
  13. 21. the sun together with the group of planets that are held by its attraction and revolve around it