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Its Bayer designation is α Orionis, Latinised to Alpha Orionis and abbreviated Alpha Ori or α Ori. With a radius between 640 and 764 times that of the Sun, [ 14 ] [ 11 ] if it were at the center of our Solar System , its surface would lie beyond the asteroid belt and it would engulf the orbits of Mercury , Venus , Earth , and Mars .
The following is a list of stars with resolved images, that is, stars whose images have been resolved beyond a point source. Aside from the Sun , observed from Earth , stars are exceedingly small in apparent size, requiring the use of special high-resolution equipment and techniques to image.
Betelgeuse, also designated Alpha Orionis, is a massive M-type red supergiant star nearing the end of its life. It is the second brightest star in Orion, and is a semiregular variable star. [ 7 ] It serves as the "right shoulder" of the hunter (assuming that he is facing the observer).
Betelgeuse and Bellatrix are south-east and south-west of the formation, forever cast as Alpha and Gamma by Bayer, they are near the top of Orion and in myth represent the hunter's shoulders. Sharpless 264 , also known as the Lambda Orionis Ring , is a molecular cloud and H II region , which can be seen in the northern region of the Orion ...
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star suggest it is both smaller — and closer — than astronomers ...
Betelgeuse is an intrinsically variable star. A variable star is a star whose brightness as seen from Earth (its apparent magnitude ) changes systematically with time. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either: [ 1 ]
α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω a b c d e f g h i j k l m n o p q r s t u v w x y z A B C D E F G H I J K L M N O P Q And: α ...
Betelgeuse has entered an uncommon period of brightening again, this time rising in brightness by around 50 percent. Is the star about to go supernova?