Author Question: Individual galaxies generally have higher mass-to-light ratios than clusters of galaxies. ... (Read 25 times)

Collmarie · **on:** Jul 27, 2018

Individual galaxies generally have higher mass-to-light ratios than clusters of galaxies.

Indicate whether the statement is true or false

Question 2

If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's rotation period and axis tilt were unchanged, then

A) stars would take twice as long to rise and set.
B) the cycle of precession would take 13,000 years instead of 26,000 years.
C) the four seasons would each be twice as long as they are now.
D) the Earth would not have seasons.