Solar system crossword

123456789101112131415161718192021222324252627282930
Across
  1. 1. What is the closest star to the earth?
  2. 3. it is a finite region of space in which there is a mass concentration high enough to generate a gravitational field
  3. 6. 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. 10. a neutron star that emits periodic radiation.
  5. 11. This thing is about two-thirds the diameter of Earth's moon and probably has a rocky core surrounded by a blanket of water ice. Interesting ice like methane and nitrogen cover its surface. Due to its lower density, the mass of this thing is about one sixth that of Earth's moon.
  6. 13. Are regions of the interstellar medium formed by gases.
  7. 15. Which is the closest star to the earth after the sun?
  8. 17. What is it called when a star dies.
  9. 18. Which is the hottest star discovered so far?
  10. 19. Which is the brightest star in our universe?
  11. 20. The largest galaxy
  12. 21. a type of neutron star powered by an extremely strong magnetic field
  13. 23. It's a moon of mars
  14. 25. The only natural satellite of the earth.
  15. 27. 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 also home to at least 30 moons, including Titan, the largest moon in the solar system and the only one with an extensive atmosphere.
  16. 30. What is the only known moon of Pluto?
Down
  1. 2. This planet is made up of fluids of water, methane and ammonia on a small rocky center. Methane makes this planet blue. this planet has rings
  2. 4. this planet is made of a thick soup of water, ammonia, and methane over an Earth-sized solid center. Its atmosphere is made of hydrogen, helium, and methane. The methane gives this planet a color blue.
  3. 5. Which is the biggest star in the universe?
  4. 7. terrestrial planet. It has a solid and active surface with mountains, canyons, plains and much more.
  5. 8. What is the closest galaxy to our galaxy?
  6. 9. 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.
  7. 12. a very compact and highly variable power source
  8. 14. What separates big plants and small planets?
  9. 16. astronomical source of electromagnetic energy
  10. 22. Is the smallest star in our galaxy?
  11. 24. Which is the coldest star discovered?
  12. 26. 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. 28. What is the most recently discovered largest star in the universe?
  14. 29. 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.