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The color of a star provides a measure of its temperature.
The brightness of a star.
The measure of a star's brightness is its magnitude. A star's brightness as it appears from Earth is called its Apparent Magnitude.Star's brightness is measured by there magnitude.
A star's luminosity is the measure of the total energy radiated by the star in one second.
photographs use to measure the brightness of a star
what is the type of star used by the Hubble to measure the distance to other galaxies.
take a ruler and measure it
Complete measure
The measure of a star's brightness is its magnitude. A star's brightness as it appears from Earth is called its Apparent Magnitude.Star's brightness is measured by there magnitude.
A sextant.
It means that the distance is greater than a certain amount - depending on how precisely you can measure the parallax.
Magnitude