Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.
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Latest News for: standard candle
Dark Energy Might Be Changing – This Is What It Means For Our Understanding Of The Cosmos
IFL Science 25 Mar 2025
It measures distances using specific supernovae (type Ia) which are used as "standard candles" ... A different method known as the distance-ladde,r which used standard candles known as Cepheid variable ...
Diana Vickers sets pulses racing in a tiny black bikini as she shares sun-kissed snap ...
The Daily Mail 24 Mar 2025
The 2008 X-Factor semi-finalist told The Standard. 'I have a vagina candle on the stage that sometimes I'll just sniff into and think "right!" ... 'This candle started as a joke between perfumer Douglas Little and GP.
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