The element first found in the Sun's spectrum, then on Earth 30 years later, is:
A) hydrogen.
B) helium.
C) solarium.
D) technetium.
E) aluminum.
B
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How does a starburst end? What might happen to the galaxy afterwards?
What will be an ideal response?
The proper interpretation of a what a galaxy's redshift measures is ____
a. its motion in space toward the observer b. its motion in space away from the big bang c. the stretching of space between the galaxy and the observer d. the contraction of space between the galaxy and the observer e. the stretching of space between the galaxy and the big bang
_______________ is believed to be produced by supernova explosions
Fill in the blank(s) with correct word
A rainbow shows separate colors of the spectrum because, at raindrop surfaces,
A. blue light is bent more than red light. B. all colors are bent the same, hence the separation. C. green light is bent more than blue light. D. red light is bent more than green light.