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

This makes it feasible to use them as standard candles.

Almost all of the physical distance indicators are standard candles.

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

Two problems exist for any class of standard candle.

Such stars have been used as standard candle distance markers for 20 years, and were key to the first observations of dark energy.

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

Standard candles provide a frame of reference for distance.

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.

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

The standard candle calibration does not work unless the object belongs to the class.

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

Standard candles play an extremely important role in astronomy due to the challenge of estimating distance.

This allows them to be used as a secondary standard candle to measure the distance to their host galaxies.

This would therefore make them potential standard candles for determining extragalactic distances.

Novae have some promise for use as standard candles.

Once a star's real brightness is known, its distance can be worked out, so that the Cepheids act as 'standard candles'.

They are "standard candles", enabling to calculate their distance.

These objects of known brightness are termed standard candles.

The first "standard candles" were made from spermaceti wax.

Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.

In astronomical parlance this distance measurement is known as a "secondary standard candle".

That is, they serve as standard candles.