Stars

2. / A large mass that forms by contraction out of the gas of a giant molecular cloud in the interstellar medium.
3. / Any star which is larger than 8 solar masses during its regular main sequence lifetime.
5. / This star is composed mainly of neutron and is produced when a supernova explodes.
7. / Nuclear Fusion + Hydrogen = ?
13. / It shows the true brightness of a star.
15. / The 3rd brightest star with an apparent of -0.0 and an absolute of -0.31.
16. / An orange giant star located about 65 light years away in the zodiac constellation of Taurus.
17. / The 7th brightest star with an apparent of 0.18 and an absolute of -6.6.
19. / An interstellar cloud of dust, hydrogen, helium and other ionized gases.
21. / It is the nearest star to the Earth.
22. / A large and unimaginable expanse of dust, gas, stars, clouds, galaxies, and life.
24. / A medium sized star with medium temperature.
25. / The brightest star with -1.44 apparent and 1.45 absolute.

1. / It is used to detect temperature, location and luminosity of stars.
4. / Appears from Earth to the naked eye.
6. / The 2nd brightest star.
8. / It is the galaxy where the Earth and Sun belongs.
9. / A stellar remnant composed mostly of electron-degenerate matter; also called a degenerate dwarf.
10. / These are cosmic energy engines that produce heat, light, ultraviolet rays, x-rays, and other forms of radiation.
11. / Stars that are fusing hydrogen atoms to form helium atoms in their cores.
12. / A kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives.
14. / It is the explosive death of star.
18. / It is believed to form from massive stars at the end of their lifetimes.
20. / The 8th brightest star with an apparent of 0.40 and an absolute of 2.68.
23. / The 5th brightest star with an apparent of 0.03 and an absolute of 0.58.