Space

4. ours has 8 planets and was formed around 4.6 billion years ago
6. The constant flow of particles streaming out of the sun's surface in all directions
7. Outermost layer of the sun
8. A layer of the sun that has a red cast to it
10. a cloud of dust, hydrogen, helium, and other ionized gases
11. A region in space where gravity is so strong nothing can escape
13. Ursa Major and the Big Dipper are examples of one
16. An extremely powerful kind of flare
19. Objects we can see in the sky
20. When the Earth, sun, and moon are aligned with the moon in the middle
26. When the total hours of daylight equals the total hours of darkness
28. Any observable occurrence relating to astronomy
32. when a huge star explodes its called a...
35. Across a star's band of colour appears a series of dark lines
36. our closest one is called Centauri
37. Edwin Hubble was a famous one. He observed galaxies beyond the Milky Way
39. Mars, Jupiter, and Earth are examples of one
41. Uranus's is tilted causing it to look like it's rolling
42. Adhi Kot, Abee, and Arroyo Aguiar are examples of these
44. equals the average distance between the sun & the Earth
45. A region of the sun's surface that is cooler than the surrounding areas

1. Considered to be the boundary between the inside & outside of the sun
2. A star in it's first phase of formation
3. An eruption on the sun's surface that can cause electromagnetic disturbances on Earth
5. We have one in our galaxy between Mars and Jupiter
9. An optical instrument that separates light into its spectral colours
12. The universe formed when an infinitely dense point suddenly & rapidly expanded in a single moment
14. The Northern Lights
15. this is the cause of our seasons
17. Light is a form of energy that travels in waves, this kind of energy is also called...
18. The study of the universe & the objects in it
21. Our closest star is 4.37...
22. Andromeda is one and it is also a the name of a cinema
23. When the Earth, sun, and moon are aligned with the Earth in the middle
24. Sirius is part of one
25. Dec 21, Shortest day
27. Earth's is 149.60 million km
29. Is the rainbow band of colours into which light separates when it passes through a prism
30. June 21, Longest day
31. A celestial body that orbits a planet
33. Matter in the universe that is invisible
34. Gravitational forces that act on a mass are greatly reduced
38. Halley, Meyer, and kracht are some types of these
40. a large (often curved) bright stream of particles extending outward from the photosphere into the corona
43. Recognizable star patterns within a larger constellation are known as...