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8 Cards in this Set
- Front
- Back
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CONSTELLATION |
a group of stars that forms a pattern. |
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LIGHT-YEAR |
the term scientists use to measure how far away stars are from the Earth....the distance light travels in one year. |
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TOOLS USED BY ASTRONOMERS: |
1.) Early telescopes had limited zoom (about 20x), they used glass lenses, they reflected light, and were small and easily transportable. Distant images were not clear. 2.) Today's telescopes have a powerful zoom (Hubble's is about 4,700x), they use mirrors and lenses, they reflect and refract light, and they are large in size. They can be earthbound or work in space. 3.) Spectrometer/Spectrographs are tools used to determine the composition of a star by the light it produces. |
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SOME CHARACTERISTICS OF THE SUN: |
1.) It is a medium sized star in our solar system. 2.) It is bright star, but it cannot be seen at night from Earth. 3.) It burns hydrogen into helium. 4.) It is in the middle of its life cycle. |
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SOME WAYS THAT THE SUN IS DIFFERENT THAN OTHER STARS: |
1.) It is a yellow star, so it's not as hot as bluish-white stars. 2.) Some stars are bigger or smaller than the Sun. Some stars are 300 times bigger than our Sun. |
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SOME WAYS THAT THE SUN IS SIMILAR TO OTHER STARS: |
1.) They burn hydrogen into helium. 2.) They all have a life cycle. 3.) They give off intense amounts of light and heat energy. 4.) They are sphere shaped. |
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CHARACTERISTICS OF STARS: COMPARING SIRIUS vs. BARNARD'S STAR: |
1.) Sirius is the 9th closest star to Earth. 2. Sirius is larger than Barnard's Star. Because it is so large, it's very bright and can be seen without a telescope. 3. Sirius is very hot because it is a white star, which are one of the hottest stars. 4.Barnard’s Star is the 3rd closest to Earth. 5.Barnard’s Star can only be seen with a powerful telescope because it is not bright. 6.Barnard’s Star is a faint red star, which are cool stars. |
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THE LIFE CYCLE OF OUR SUN: |
1.) After it was born from a nebula, it became a medium mass star. 2.) It will eventually become a RED GIANT. The outer parts will grow bigger and drift into space forming a cloud of gas called a PLANETARY NEBULA. 3.) It starts to cool and become a WHITE DWARF. 4.) The WHITE DWARF will eventually run out of fuel and die as a BLACK DWARF. |
