Get the latest Science News and Discoveries

Cepheid Variables are the Bedrock of the Cosmic Distance Ladder. Astronomers are Trying to Understand them Better

One of the most fundamental questions astronomers ask about an object is "What's its distance?" For very faraway objects, they use classical Cepheid variable stars as "distance rulers". Astronomers call these pulsating stars "standard candles".

None

Get the Android app