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Unity's Astronomy
Astronomy for Ms. Hall
| Question | Answer |
|---|---|
| Who were three of the first early astronomers? | Ptolemy, Copernicus, Tycho Brahe |
| What is a "Light Year"? | A unit of length equal to the distance that light travels in one year |
| What makes up the first stages of a star? | Gas and dust |
| What is it called when when gravity pulls gas and dust together? | A nebula |
| What does Nuclear Fusion combine? | Hydrogen atoms |
| How does a Red Giant "die"? | It burns out like a candle |
| What are two things that may happen to a star that explodes? | Turning into a Super Nova or a Black Hole |
| What does "H-R" Stand for in H-R Diagram? | Hertsprung-Russell |
| What is an H-R Diagram? | A graph that shows the relationship between a star's surface temperature and absolute magnitude |
| What is the Main Sequence? | The diagonal pattern on an H-R diagram where most stars lie |
| What is a Black Hole? | An object that is so massive that even light cannot escap its gravity |
| What is a Galaxy? | A collection of stars, dust and gas held together by gravity |
| What is an example of a spiral galaxy we are familiar with? | The Milky Way |
| What is a massive blob of stars? | Elliptical Galaxies |
| Do irregular galaxies fit into any certain class? | No |
| How long did the Big Bang Theory occur? | 13.7 Billion years ago |
| What makes up comets? | Ice, rock, and cosmic dust that is loosely packed together |
| Are comet tails a solid? | No |
| What makes a comet tail? | The melting of the ice in a comet that gives off gas |
| Do comet tails point towards the sun or away from the sun? | Away |
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hcps-bowlingue
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