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Measuring A Star`s Size And Distance
Astronomers used the Near-Infrared Triple Spectrograph (TripleSpec) at California`s Mount Palomar Observatory to measure the temperatures and metallicities of small stars called M dwarfs, first recorded by the NASA Kepler mission, which then led to observations of planets orbiting these stars. ... The three planets orbit their host stars within distance in which liquid water could exist, and the sweet spot for determining whether life could be possible. The host& ...
measuring a star`s size and distance
"Once you know a star`s surface gravity then you only need one other measurement, its temperature, which is pretty easy to obtain, to determine its mass, size and other important physical properties," said Stassun. "Measuring& ...
How do astronomers measure distances across the universe? With parsecs ... If we were to view a giant star with a diameter of 1 AU at a distance of one parsec, it would appear to be just 1/3600th of a degree in angular size.
By obtaining improved figures for a wide variety of stars at varied distances, this new method might be able to cut the uncertainty figure in half. “Once you know a star`s surface gravity then you only need one other measurement, its temperature, which is pretty easy to obtain, to determine its mass, size and other important physical properties,” said Stassun. “Measuring stellar surface gravities well has always been a difficult business,” added Gibor Basri, professor of& ...
Astronomers used the Near-Infrared Triple Spectrograph (TripleSpec) at California`s Mount Palomar Observatory to measure the temperatures and metallicities of small stars called M dwarfs, first recorded by the NASA Kepler mission, which then led to observations of planets orbiting these stars. ... The three planets orbit their host stars within distance in which liquid water could exist, and the sweet spot for determining whether life could be possible. The host& ...
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