Author Question: What is the ecliptic? A) the path the Sun appears to trace around the celestial sphere each year ... (Read 89 times)

Pineappleeh · **on:** Jul 27, 2018

What is the ecliptic?

A) the path the Sun appears to trace around the celestial sphere each year
B) the Sun's daily path from east to west in our sky
C) the path traced by the Moon's shadow on Earth during a solar eclipse
D) a half-circle extending from your horizon due north, through your zenith, to your horizon due south

Question 2

Based on current evidence concerning the amount of deuterium in the universe, we can conclude that

A) ordinary (baryonic) matter makes up most of the mass of the universe.
B) neutrons greatly outnumber protons in the universe.
C) most of the deuterium that was created during the era of nucleosynthesis has since been destroyed.
D) the density of ordinary (baryonic) matter is between 1 percent and 10 percent of the critical density.
E) we live in a critical-density universe.