Monday, August 18, 2014


Cepheid Variables are very luminous stars, 500 to 300,000 times greater than the Sun, with short periods of change that range from 1 to 100 days. They are pulsating variables that expand and shrink dramatically within a short period of time, following a specific pattern. Astronomers can make distance measurements to a Cepheid by measuring the variability of its luminosity, which makes them very valuable to the science.

Sources and further reading:

Video source:
Credit: NASA, ESA, M. Kornmesser

No comments:

Post a Comment