sirius is the brightest star in the night sky seen from earth.
sirius is the brightest star in the night sky seen from earth.
what is the brightest star in the night sky seen from earth?
sirius
the sun has an apparent magnitude of −26.7, but its absolute magnitude is only +4.83. sirius, the brightest star in the night sky as seen from earth, is approximately 23 times more luminous than the sun, while canopus, the second brightest star in the night sky with an absolute magnitude of −5.53, is approximately 14,000 times more luminous than the sun. despite canopus being vastly more luminous than sirius, however, sirius appears brighter than canopus. this is because sirius is merely 8.6 light-years from the earth, while canopus is much farther away at a distance of 310 light-years.
star
betelgeuse









































betelgeuse is generally the ninth-brightest star in the night sky and second-brightest in the constellation of orion (after rigel). it is a distinctly reddish, semiregular variable star whose apparent magnitude varies between +0.0 and +1.3, the widest range of any first-magnitude star. at near-infrared wavelengths, betelgeuse is the brightest star in the night sky. it has the bayer designation α orionis, which is latinised to alpha orionis and abbreviated alpha ori or α ori.
betelgeuse