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Author Question: About how many galaxies are presently known in our Local Group? A) 3 B) 27 C) 55 D) 107 E) ... (Read 40 times)

WhattoUnderstand

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on: Jul 27, 2018
About how many galaxies are presently known in our Local Group?
 
  A) 3 B) 27 C) 55 D) 107 E) 254

Question 2

Contrast the orbits of comets and asteroids.
 
  What will be an ideal response?


fur

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

C

Answer to Question 2

Comet orbits are high in eccentricity and come from all directions in space; most are far beyond the orbit of Neptune during most of their orbits. Asteroid orbits are much more circular, and most lie close to the ecliptic between the orbits of Mars and Jupiter.


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