Solar system crossword

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Across
  1. 4. which is the biggest star in the universe?
  2. 6. it is a gas giant planet with no solid surface; it is 9.45 times wider than Earth and 95 times more massive. It is surrounded by rings consisting of small ice-covered particles and is
  3. 7. It has a solid surface that is covered in craters like our Moon. It has a fine atmosphere and it has no moons. this planet rotates slowly compared to Earth, so a day lasts a long time.
  4. 11. dwarf which is the coldest star discovered?
  5. 14. What is the closest star to the earth?
  6. 15. a very compact and highly variable power source
  7. 17. The only natural satellite of the earth.
  8. 18. Its atmosphere is composed mainly of hydrogen gas and helium, like the sun. The planet is covered in thick red, brown, yellow, and white clouds. Clouds make the planet appear striped.
  9. 20. What is it called when a star dies.
  10. 22. Centauri which is the closest star to the earth after the sun?
  11. 24. which is the brightest star?
  12. 25. a type of neutron star powered by an extremely strong magnetic field
Down
  1. 1. it is a finite region of space in which there is a mass concentration high enough to generate a gravitational field
  2. 2. what is the most recently discovered largest star in the universe?
  3. 3. astronomical source of electromagnetic energy
  4. 5. terrestrial planet. It has a solid and active surface with mountains, canyons, plains and much more.
  5. 8. What is the closest galaxy?
  6. 9. The largest galaxy
  7. 10. star discovered so far?
  8. 12. A neutron star that emits periodic radiation.
  9. 13. What is the only known moon of Pluto?
  10. 16. The size of this planet is only slightly smaller than our home planet. The interior of this planet is made of a metallic iron core, and has a molten rock mantle.
  11. 19. It's a moon of mars
  12. 21. The average temperature on this planet is minus 26 degrees Celsius, well below freezing! Its surface is rocky, with canyons, volcanoes, dry lake beds and craters everywhere.
  13. 23. which is the hottest star discovered so far?