In the 1960s, Maarten Schmidt determined that quasars were very distant objects by
A)determining how small the source of light was from its luminosity variations.
B)determining how luminous they were.
C)determining their parallax angles.
D)determining their redshifts.
E)discovering that they were embedded in distant galaxies.

Question

Quizplus · Accepted Answer

Maarten Schmidt determined the distance to quasars by analyzing their redshift, which is a measure of how much their light has been stretched to longer, redder wavelengths due to the expansion of the universe. The higher the redshift, the further away the object is. Schmidt discovered that quasars had extremely large redshifts, indicating that they were located at enormous distances from Earth.

In the 1960s, Maarten Schmidt Determined That Quasars Were Very