Question

which is one piece of information that astronomers use to calculate the age of the universe? dark energy the age of rocks on earth the current motion of inner planets patterns of background radiation

Explanation:

Cosmic microwave background radiation (CMBR) is a key observational evidence for the Big Bang. By analyzing the patterns and properties of this background radiation, along with other data like the Hubble constant, astronomers can calculate the age of the universe. Dark energy relates to the universe's expansion acceleration, Earth rock ages only reflect our planet's age, and inner planet motion does not provide data for universal age calculations.

Answer:

patterns of background radiation