Ripples in the Cosmic Microwave Background correspond to:
A) matter density fluctuations.
B) temperature fluctuations.
C) energy fluctuations.
D) fluctuations in both matter and radiation.
E) imperfections in measurement techniques or equipment.
Question 2
Which of the following is most like the rotation of stars in the disk of the Milky Way?
A) a DVD in a player
B) the planets in our solar system
C) cars moving at a constant speed on a circular race track
D) the hands of an analog clock
E) the tire of a car moving
The niche of Spartina anglica is related to tidal fluctuations.
Brain scans showing the white-matter pathways involved in everyday learning:
Our Motion Through the Microwave Background
Gray Matter vs. White Matter
Physics - Pressure, Density, Pascal's Principle