Physical science - Lesson 9
Across
- 2. - any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave
- 6. - another term of extrasolar
- 8. - planet comes from the greek word
- 10. - methods depends on the obsevation of the proper motion
- 12. - helps undertanding the size of the universe
- 14. - Theory of the beginning of the universe
- 15. - all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
- 18. - is a structure that consists of anywhere from hundreds to thousands of galaxies
- 19. - theory that there is no beginning to the universe nor the there be en end
- 20. - the apparent change in the frequency of a wave, caused by the relative motion between the source and the observe
- 22. body - is any natural body outside of the Earth's atmosphere
- 24. - spherical collection of stars that orbits a galactic core as a satellite
- 25. - small very dense star that is typically the size of a planet
- 26. - a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter
Down
- 1. - explained that the shift was beacuase star must be moving away
- 3. - composed of different planets and stars
- 4. - a very large star of high luminosity and low surface temperature
- 5. - the change in the apparent position of star
- 7. - event when planet drossed in front of a star
- 9. - a key concept for astronomers
- 11. - _____________ fitting is the process of determining the star cluster
- 13. -a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.
- 16. - a planet outside our solar system that orbits a star
- 17. - spacetime in general relativity
- 21. - planet that is no longer a planet
- 23. - an astronomical body orbiting a star or stellar remnant that. is massive enough to be rounded by its own gravity