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Mr. Belyea
Astronomy Lesson 2
| Question | Answer |
|---|---|
| what and where is the sun | a star in the center of the solar system |
| why does the sun look so bright | because it is closer to the Earth than other stars |
| what is the sun made of | a hot ball of glowing gases |
| what is deep inside the sun | atoms that combine in nuclear reactions |
| what do the nuclear reactions deep in the sun do | change small amounts of matter into gigantic amounts of heat and light energy |
| why do the sun and stars glow | the huge amount of energy the nuclear reactions give off make the sun so hot that they glow |
| what color is the sun | yellow |
| what color are other stars | white, blue or red |
| do all stars glow | no, some are dark |
| light year | the distance light travels in one year |
| what is used to measure distance to the planets | Astronomical units AUs |
| what is used to measure distance to the stars | the speed of light, light year |
| how many times can light travel around earth in one second | seven times |
| how many minutes does it take for light to reach earth, explain what sunlight we are seeing | 8 minutes, we are seeing light that left the earth 8 minutes ago |
| how do astronomers group stars | by their properties |
| what properties are used to group starts | brightness, color, and size |
| what is a stars brightness dependent on | how big, how hot and how far away from Earth |
| what determines if a star gives off more light | the bigger and hotter the star |
| what does a stars color depend on | its temperature |
| what color star is the coolest | red stars |
| what color star is medium-hot | yellow stars |
| what color stars are the hottest | blue-white stars |
| what is the diameter of the sun in relation to the Earth | 100 times the diameter of the Earth |
| how much bigger is Betelgeuse than the sun | 500 times bigger than the sun |
| how large can stars be | 1000 times bigger than the sun |
| what is Polaris | the North Star, 3 stars close together that move around each other in space |
| constellation | stars that appear to be in groups when viewed from Earth, they are not really that close in space |
| Name some constellations | big dipper, little dipper, cassiopeia, and orion |
| galaxies | group of billions of stars, dust, and gases in space held together by gravity, they are close together |
| can you see galaxies | yes they look like faint stars |
| where is the solar system located | near the milky way galaxy |
| what is the Milky way | a cloudy band of millions of stars |
Created by:
mloft
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