# Standard candle

In astronomy , **standard candles** are objects whose absolute brightness can either be measured directly or calculated using directly measurable parameters. Then one can deduce the distance of the objects based on their apparent brightness . This results from the distance module :

where D is the distance, *kpc is* the unit kiloparsec (10 ^{3 } parsec ), m is the *apparent brightness* and *M is* the *absolute brightness* .

So z. B. With the help of Cepheids the distance to nearby galaxies of which they are part can be determined via the period-luminosity relationship . A distance ladder can be constructed from various standard candles .

Examples of standard candles:

Other methods of distance measurement :

- Parallactic Distance - Basic Method
- Spectroscopic distance
- Photometric distance
- Tully-Fisher relationship
- Faber-Jackson relationship
- Redshift

## Web links

**Wiktionary: standard candle**- explanations of meanings, word origins, synonyms, translations