Across the Stars Down to Earth

3. / Most prominent star patterns in the sky
5. / A hot luminous celestial body
8. / Famous constellation known as "The Hunter"
9. / Group of stars that form a certain pattern
11. / Stars which suddenly become very bright
14. / Largest giant stars
15. / The distance light can travel in one year
17. / Belief in the positions of celestial body influence the people's personalities and shape their lives
18. / A spiral galaxy where the solar system belongs

1. / It means "circle of animals in Greek"
2. / The scientific study of the objects in the universe
4. / A plot of the temperature of many stars against their luminosities
6. / Star patterns that have been discovered but have not been officially identified as constellation
7. / Small stars that are located on lower left of H-R diagram
10. / Stars which explode violently
12. / A large cloud of gas and dust
13. / An invisible object with very powerful gravitational force
14. / Nearest star on Earth
16. / The apparent shift position of an object when viewed from two different positions