Question
which is evidence for the existence of dark energy?
a. pulsars that seem to be moving closer at an accelerating rate
b. galaxies that are rotating at a constant rate
c. supernovae that are moving away at an accelerating rate
d. black holes that are expanding at a constant rate
a. pulsars that seem to be moving closer at an accelerating rate
b. galaxies that are rotating at a constant rate
c. supernovae that are moving away at an accelerating rate
d. black holes that are expanding at a constant rate
Answers
Answered by
GPT-4o mini
The correct answer is: **c. supernovae that are moving away at an accelerating rate**.
The discovery of distant supernovae, particularly Type Ia supernovae, has provided compelling evidence for the existence of dark energy. Observations indicated that these supernovae were fainter than expected based on a constant rate of expansion of the universe, suggesting that the expansion is accelerating. This led to the conclusion that a mysterious form of energy, now referred to as dark energy, is driving this acceleration.
The discovery of distant supernovae, particularly Type Ia supernovae, has provided compelling evidence for the existence of dark energy. Observations indicated that these supernovae were fainter than expected based on a constant rate of expansion of the universe, suggesting that the expansion is accelerating. This led to the conclusion that a mysterious form of energy, now referred to as dark energy, is driving this acceleration.