These standard candles were what revealed that the expansion of the universe is accelerating.

Two problems exist for any class of standard candle.

A significant issue with standard candles is the question of how standard they are.

This makes it feasible to use them as standard candles.

Almost all of the physical distance indicators are standard candles.

As a result, they are considered "standard candles," objects with a known intrinsic brightness.

The foot-candle is the intensity of light at one foot from a standard candle.

The relation is measured and calibrated using primary standard candles.

It is thus useful in the study of these stars, which are important standard candles.

This homogeneity with the large brightness makes them one of the best standard candles to determine their distance.