Across
- 2. a system of stars and associated matter held together by gravitational attraction
- 6. located in the nucleus; determines the genetic traits of an organism (deoxyribonucleic acid)
- 7. diagram a diagram that shows the relationship between the brightness, surface temperature and color of stars
- 9. luminous globe of gas which produces its own heat and light by nuclear reaction made of mostly hydrogen and helium gas
- 11. segment of DNA found on a chromosome; determines the inheritance of a particular trait
- 14. which began and is still expanding
- 15. site of photosynthesis in plant cells
- 16. Bang theory a scientific theory concerning the early development and shape of the universe from a dense
- 18. universe
Down
- 1. fluid that surrounds the organelles
- 3. the measure of the observed visible brightness of a star
- 4. clouds of dust and gas; site of star formation; remains of dead or dying stars
- 5. microwave background electromagnetic radiation that remains from the Big Bang and early stages of
- 8. total amount of light (energy) emitted by a star or other celestial body
- 10. hole a region in space where gravity is so strong that even light cannot escape
- 12. observations of galaxies moving away from each other and our own Milky Way galaxy
- 13. Way galaxy – the galaxy which contains our Sun and its solar system, including Earth
- 17. wall gives structure to plant cells