The cosmic microwave background is:
A) redshifted in the direction of Earth's motion.
B) redshifted in the direction of the Sun's motion.
C) redshifted in the direction of the center of the Milky Way.
D) blueshifted in the direction of Earth's motion.
E) blueshifted in the direction of the Virgo Cluster.
Question 2
If the Sun were replaced by a one solar mass black hole:
A) all terrestrial planets would fall in immediately.
B) we would still orbit it in a period of one year.
C) we would immediately escape into deep space, driven out by its radiation.
D) our clocks would all stop.
E) life here would be unchanged.
Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth
Earth’s Revolution and Rotation
Range of Motion at the Wrist.
Wavelengths that penetrate the earth's atmosphere
Natural Hazards: Earth's Processes as Hazards, Disasters, and Catastrophes, 4th Edition
The Cosmic Calendar: Concepts of Time