This measure can be estimated by observing Cepheid [SEHÂ­feeÂ­id] variables in the standard candle method.
This measure can be estimated by observing Cepheid [SEHÂ­feeÂ­id] variables in the standard candle method. The apparent motion of nearby stars during Earth's revolution yields another type of this quantity called "stellar parallax." Barnard's Star has 1.8 (*) parsecs of this measure, and there is one Astronomical Unit of this measure between the Sun and Earth. For 10 points, name this quantity that can be measured in lightÂ­years.
This measure can be estimated by observing Cepheid [SEHÂ­feeÂ­id] variables in the standard candle method.
distance