This makes the technique especially useful as a distance indicator.

In the 1960s, astronomers found that the maximum intensities of supernova explosions could be used as distance indicators.

They also have a well established period-luminosity relationship, and so are also useful distance indicators.

Using the 419.10 miles he'd found on the 707's distance indicator, he did some quick calculations which led to a very interesting discovery.

Almost all of the physical distance indicators are standard candles.

At extreme distances, which is where one most wishes to use a distance indicator, this recognition problem can be quite serious.

Another class of physical distance indicator is the standard ruler.

There have been a number of difficulties associated with using Cepheids as distance indicators.

With this large sample, the project calibrated and cross checked a number of the secondary distance indicators.

Continue on Route 8, past the tollbooth until the distance indicator for Kilometer 110.