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Which star has the greatest brightness?
Sirius.
Is Sirius the largest star?
No. Sirius is the brightest star in Earth's night sky, but how bright a star appears is a product of its actual brightness and its distance from us. Sirius itself is actually two stars with Sirius A emitting the vast majority of the system's light. Sirius A is a fairly large star, but others are much larger.
What is sirius A named after?
Sirius was named after the word 'blazing' which fits because it is the brightest star in the night sky AND twice the size and brightness
Is Sirius brighter than Polaris?
As seen from Earth, yes, Sirius is the brightest star in the night sky. In terms of actual brightness, no.
Is it true that a stars absolute brightness is when its seen from earth?
No - a star as seen from earth is it's apparentbrightness. It's absolute brightness is measured by astronomical instruments. The brightest visible star from earth is Sirius, in the constellation Canis Major. Spica, in Virgo, has a much higher absolute brightness than Sirius, but Sirius is much closer to earth, so it is apparently brighter than Spica.
What is the brightest star and its brightness?
That is Sirius. Its "apparent magnitude" is minus1.5 approximately. Sirius is the brightest star in the sky for us on Earth, but it's not the most luminous star in "absolute magnitude". The main reason that it is so bright is just that it is very close to us.
What is Actual brightness of a star?
a star is made up of burning gases which makes it a luminous body. the sun is the only star in the solar system. the brightest star except the sun is sirius
The actual brightness of the star is what?
a star is made up of burning gases which makes it a luminous body. the sun is the only star in the solar system. the brightest star except the sun is sirius
How does the greek letter designation of a star give you clues to its location and brightness?
The Greek letter designation of a star gives its relative brightness compared to other stars in the same constellation. For example, Alpha Canis Majoris (Sirius) is the brightest star in the constellation Canis Major.
Even though this star has an absolute magnitude greater then that of sirius it looks dimmer from earth since it's 100 times farther away?
The apparent brightness of a star depends mainly on (1) its absolute (i.e., real) brightness, and (2) the square of its distance from us. The absolute magnitude of Sirius is +1.45, while that of Rigel is -6.95, meaning that Rigel is approximately 2,290 times as bright as Sirius. However, Rigel is approximately 100 times as far from us (870 light years versus 8.6 light years), which reduces its brightness relative to Sirius by a factor of over 10,000. This makes Sirius about 4.5 times brighter than Rigel for a difference of 1.62 magnitudes (-1.44 relative magnitude for Sirius versus +0.18 for Rigel).
What does the absolute brightness of the star depend on?
the brightness of a star
What is the measure of the star's brightness?
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.
