| Across |
| 2. |
the science of the origin and development of the universe. |
| 3. |
a very large star of high luminosity and low surface temperature. |
| 5. |
existing matter and space considered as a whole; the cosmos. |
| 8. |
the science of the origin and development of the universe. |
| 10. |
galaxy is a type of galaxy with an approximately ellipsoidal shape and a smooth, nearly featureless image. |
| 12. |
a prominent pattern or group of stars, typically having a popular name but smaller than a constellation. |
| 14. |
to measure distances to nearby stars. |
| 16. |
a region of space having a gravitational field so intense that no matter or radiation can escape. |
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| Down |
| 1. |
the displacement of spectral lines toward longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. |
| 4. |
a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. |
| 6. |
a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass. |
| 7. |
a galaxy in which the stars and gas clouds are concentrated mainly in one or more spiral arms. |
| 9. |
a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution. |
| 11. |
a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. |
| 13. |
ball of gas |
| 15. |
Galaxy |
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