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Author Question: Which of the following best describes what we mean by the universe? A) a vast collection of stars ... (Read 50 times)

leo leo

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on: Jul 27, 2018
Which of the following best describes what we mean by the universe?
 
  A) a vast collection of stars that number as many as the grains of sand on all the beaches on Earth
  B) the sum total of all matter and energy
  C) all the galaxies in all the superclusters
  D) The universe is another name for our Milky Way Galaxy.

Question 2

The star Rho Cancri B has about the same mass as our Sun, and the planet discovered around it orbits somewhat closer than Mercury orbits our Sun. The mass of the planet is estimated to be 1.1 times the mass of Jupiter.
 
  Why, according to our theory of solar system formation, is it surprising to find a planet the size of Rho Cancri B's planet orbiting at this distance?


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bigcheese9

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Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

In the nebular theory, jovian planets form beyond the frost line. In our solar system, this was beyond the orbit of Mars, so it is surprising to find a jovian planet orbiting so close to its star.


leo leo

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


bigcheese9

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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