Across
- 5. The largest galaxy
- 7. a neutron star that emits periodic radiation.
- 9. Which is the closest star to the earth after the sun?-
- 10. Are regions of the interstellar medium formed by gases.
- 12. Which is the brightest star?
- 13. Which is the coldest star discovered?
- 15. What is the most recently discovered largest star in the universe?
- 18. 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.
- 19. What is the closest star to the earth?
- 20. 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.
- 21. 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.
- 26. 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.
- 28. What is the closest galaxy?
- 29. astronomical source of electromagnetic energy
Down
- 1. Which is the biggest star in the universe?
- 2. a type of neutron star powered by an extremely strong magnetic field
- 3. 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.
- 4. What is the only known moon of Pluto?
- 6. a very compact and highly variable power source
- 8. Which is the hottest star discovered so far?
- 11. terrestrial planet. It has a solid and active surface with mountains, canyons, plains and much more.
- 14. What separates big plants and small planets?
- 16. Star discovered so far?
- 17. it is a finite region of space in which there is a mass concentration high enough to generate a gravitational field
- 19. What is it called when a star dies.
- 22. It's a moon of mars
- 23. 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.
- 24. 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
- 25. The only natural satellite of the earth.
- 27. 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.