Which of the following can most efficiently be used to measure the distance to a galaxy?
A) Type Ia supernovas
B) gamma-ray bursts
C) Type II supernovas
D) novas

Question

Quizplus · Accepted Answer

Type Ia supernovas are known as "standard candles" because they have a consistent brightness that astronomers can use to determine their distance from Earth. They have been used to accurately measure the distances to nearby galaxies and even to the most distant known galaxies in the universe. Gamma-ray bursts and novas are not consistent enough and Type II supernovas have a wider range of brightness, making them less reliable for distance measurements.

Which of the Following Can Most Efficiently Be Used to Measure