Question

which is evidence for the existence of dark energy? (1 point)galaxies that are rotating at a constant rate.supernovae that are moving away at an accelerating rate.black holes that are expanding at a constant rate.pulsars that seem to be moving closer at an accelerating rate.

Explanation:

Dark energy is hypothesized to explain the observed accelerated expansion of the universe. Observations of distant Type Ia supernovae revealed that these objects are moving away from us at an accelerating rate, which is key evidence supporting the existence of dark energy. The other options do not relate to the evidence for dark energy: constant rotation of galaxies relates to dark matter, black holes do not expand at a constant rate, and pulsars moving closer does not align with cosmic expansion observations.

Answer:

Supernovae that are moving away at an accelerating rate.