Thursday, March 30, 2017

Sun and Stars

Abbey Wilt & Paige Bybee
https://drive.google.com/open?id=0BzmEx5DxbNfSWkJIemVsSmVXZzQ

16 comments:

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    1. Hydrogen's emission spectrum is split into spectral series that are seen because of the energy level transitions in the atom. It is seen in different colors at various wavelengths, including red, blue-green, blue-violet, and violet.

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  3. Why does the temperature drop at the top of the radiation zone?

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    1. The temperature drops because from the bottom to the top of the radiative zone, the density drops from about the density of gold 20g/cm3 to 0.2g/cm3 (less than the density of water).

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  4. What makes up the rest of the solar systems mass? -Kacey Kadlec

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    1. The Sun makes up nearly 99% of the mass of the solar system. The rest is made up of planets, satellites, and the gas, dust, comets & asteroids surrounding stars.

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  5. What are the top three most luminous stars in our solar system?

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    1. The three most luminous stars are: R136a1 (in the Large Magellanic Cloud), Melnick 34 (also in LMC), M33-013406.63 (in the Triangulum Galaxy)

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  6. Does the brightness of the sun change over time?

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    1. The brightness of the sun fluctuates a few tenths of a percent over the course of the solar cycle

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  8. How are we able to tell how old the sun is? And how far away it is from Earth?

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    1. The age of the sun is determined by radioactive dating objects that formed around the same time as the sun. When astronomers measure the distance of the sun to earth, they measure the distance from Earth to another planet (such as Venus). They scale that distance to the Sun by using their knowledge of interplanetary distances.

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  9. Will the sun eventually get to hot for us to live here on Earth?

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    1. Over the course of the Sun's life cycle, it will eventually get too hot as it becomes a red supergiant, but that is not expected for another 3-4 billion years.

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