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Mirzam

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description Mirzam Overview

Mirzam, officially designated Beta Canis Majoris, is a blue-white giant star located roughly 500 light-years from Earth in the constellation Canis Major. It serves as the prototype for the Beta Canis Majoris variables, a class of pulsating variable stars. The star is one of the brightest in the night sky and marks the position of the Greater Dog. Its brightness fluctuates slightly due to non-radial pulsations occurring every few hours.

help Mirzam FAQ

Why is the star Mirzam significant in astronomy?

Mirzam, also known as Beta Canis Majoris, is significant because it is the prototype for a class of pulsating variable stars known as Beta Canis Majoris variables. These massive stars subtly change in brightness over just a few hours.

Where can you find Mirzam in the night sky?

Mirzam is located in the constellation Canis Major, positioned to the west of Sirius, which is the brightest star in the entire night sky. Its Arabic name actually translates to "the herald," referring to how it rises just before Sirius.

What kind of star is Beta Canis Majoris?

It is a blue-white giant star (spectral class B1 II-III) situated roughly 500 light-years away from Earth. It is much larger and more luminous than our Sun, burning at significantly higher temperatures.

How much does Mirzam's brightness vary?

Mirzam exhibits extremely tiny magnitude variations of about 0.02 to 0.03 over a period of roughly six hours. These rapid pulsations are mostly invisible to the naked eye and are typically detected by sensitive astronomical instruments.

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