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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:
http://www.space.com/9592-50-year-mystery-strange-pulsating-stars-solved.html
http://www.space.com/15396-variable-stars.html
http://www.aavso.org/variable-stars-main
Video source:
http://www.spacetelescope.org/videos/heic1323j/
Credit: NASA, ESA, M. Kornmesser
Sources and further reading:
http://www.space.com/9592-50-year-mystery-strange-pulsating-stars-solved.html
http://www.space.com/15396-variable-stars.html
http://www.aavso.org/variable-stars-main
Video source:
http://www.spacetelescope.org/videos/heic1323j/
Credit: NASA, ESA, M. Kornmesser
CORINA MARINESCU
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