Betelgeuse

Betelgeuse is a red supergiant star, so it does not have a solid crust like planets. Instead, its outer layers are composed of hydrogen and helium gas undergoing nuclear fusion in its core. The star's atmosphere is continuously expanding and ejecting material into space.

Betelgeuse is a red supergiant star in the late stages of its life cycle. It will eventually explode in a supernova, creating heavy elements and releasing a vast amount of energy. After the explosion, it may form a neutron star or a black hole, depending on its mass.

If the radius of Betelgeuse varies by 60% within three years, its luminosity will also change proportionally. Since absolute magnitude is related to luminosity, the ratio of the two absolute magnitudes will be the square root of the ratio of the luminosities. So, the ratio of the two absolute magnitudes will be approximately 1.22.

It isn't the brightest star - at least, usually Rigel is brighter. However, Betelgeuse is variable, and can sometimes be brighter than Rigel. Wikipedia lists its luminosity as 105,000 times the luminosity of our Sun; and the distance, as 640 light years. Assuming these numbers, this would make it as bright as a star that is 10.5 times as bright as our Sun, at a distance of only 6.4 light years. In other words, the extreme luminosity compensates for its distance.

Simply put. No it's not, Not in terms of Mass or Radii. While it's one of the largest stars in our neck of the woods(within 1000 lightyears around the sun) Before I go on let me give you some facts about Betelgeuse/Alpha Orionis . Betelgeuse is a M2I-a Supergiant/Hypergiant star. its around 600 light years away which is a recent finding as just a few years ago we thought the star was 540-560ly away. Betelgeuse Has a Solar Mass of 18 or 19 solar masses and a solar radii of 936. Now i can move on to some other stars that are much larger then Betelgeuse.

1. VY Canis Majoris- This star has a solar radii of a mind boggling 2100 solar radii that's over 2 times the size of betelguese

2. Eta Carina- This MASSIVE star tips the scales on how much mass a star can have at a whooping 150 solar masses. that's 7.8x heavier then betelgeuse

Look up the Quintuplet Cluster for more larger stars then betelgeuse cause we astronomers look at that particular cluster to observe how big stars can actually get, since its towards the galactic center and we believe that the galactic center favors larger objects.

Any how I hope i was some help.

Betelgeuse marks the "Hunter's" right shoulder. For a northern-Hemisphere observer

viewing the constellation, it's the bright, reddish star in the upper-left corner of Orion's

main rectangle.

It's difficult to know exactly what Betelgeuse will become, but it will most likely explode as a supernova. The result will probably be a black hole, but depending on the magnitude of the explosion, it could become a neutron star or pulsar.

The date on which Betelgeuse will be on the meridian at 12 midnight depends on your location and the current date. You can check a star chart or astronomy app for your specific observing location to determine when Betelgeuse will cross the meridian at midnight tonight.

A star's brightness is a function of its luminosity, or the amount of energy it produces per unit time. Vega must have a higher luminosity, meaning it fuses more material than Betelgeuse in a given period of time.

A nebula ... Latin word for "cloud" ... is any object in the sky that appears hazy or cloudy to the eye. It may be a cloud of luminous gas, or a group of stars so far away that they are perceived as a haze rather than as individual points of light. In the extreme ... the largest objects with star density large enough that they might merge into an apparent haze are galaxies. Clusters of galaxies are so large and widespread that their existence was not even suspected 100 years ago, for the same reason that an ant on a tree doesn't suspect that this tree is part of a forest, and there are large open spaces between forests.

"Beetlejuice" is a common nickname for Betelgeuse, a red supergiant star in the constellation of Orion.

Its quite possible that when Betelgeuse goes supernova (within a short "astronomical" time scale) that the remaining core will have enough mass to become a black hole. When it does, it will become the most studied "star" in our lifetime.

• The Sun is a yellow dwarf - Betelgeuse is a red supergiant
• The Sun has a spectral type of G2V, Betelgeuse is M2
• Betelgeuse is about 1,000 times larger than our Sun.
• Betelgeuse will explode as a supernova our Sun won't.
• Our Sun has a temperature of about 5,700 Kelvin, Betelgeuse is 3,500 K.
• Betelgeuse is only a few million years old, the Sun is 4.5 billion years old.
  

You can tell if Rigel or Betelgeuse is hotter based on their color. Rigel appears blue-white, indicating a hotter temperature, while Betelgeuse appears orange-red, suggesting a cooler temperature. Additionally, the spectral class of Rigel (B8Ia) is hotter than Betelgeuse's spectral class (M1-2Ia).

Because of its ENORMOUS size. We believe that Betelgeuse is about as large as a the orbits of the Asteroid Belt, so if Betelgeuse were here in our own solar system, it would consume Mercury, Venus, Earth and Mars, and probably destroy Jupiter as well.

As stars go, the 800 light-year distance to Betelgeuse is not that far away, although we wouldn't want it to be any closer. When Betelgeuse becomes a supernova, it will likely outshine the Moon.

Betelgeuse is observed to be very unstable as of now, with large charges luminosity. It is expected to die within the next few thousand years. In fact, it might already be dead, but the light from the resulting supernova explosion could still be in transit. It takes around 640 years for that light to reach us.

The size of Betelgeuse is variable (it pulsates); plus, there are different estimates. But its diameter is approximately 900 times that of our Sun, which in turn is roughly 100 times the diameter of Earth (actually 109, but the data don't justify a very exact calculation), so Betelgeuse has roughly 900 x 100 = 90,000 times the DIAMETER of Earth; the ratio of volumes is that same number, cubed, or (after some rounding) about 700,000,000,000,000 times as much.

Not quite. The North Star, Polaris, is about six-tenths of a degree away from being directly above the North Pole. Considering that this happened completely by chance, the coincidence is very handy.

The red giant star Betelgeuse, in the shoulder of the constellation Orion, is one of the brightest stars in the winter sky. It has been known since antiquity.

We really have no way of knowing "who was first" or "what year..." for things that happened over 3,000 years ago. Mostly, the records were lost, or destroyed, or for things THAT long ago, they were never "recorded" at all.

Surprisingly perhaps, it is fairly cool for a star. Betelgeuse is a red giant, meaning it is reaching the end of its life. When a star like our sun, a moderate Main Sequence Star begins to run out of fuel, there is a reaction in the collapsing core that briefly (in the lifetime of a star..briefly can be millions of years) causes the outer layers to expand outward. The gases cool off as they move farther from the core. Red light holds the least energy, which is why the star's outer layers turn red. It is also the coolest light.

Our sun will one day become a red giant like Betelguese, and its outer layers will expand far enough to engulf Mars.

One day, Betelgeuse will loose its outer layers in a nova, and all that will be left will be a white dwarf core.

Look up the Hertsprung-Russell diagram and you'll get more exact temperatures for red giants, but red stars of any type are the coolest.

Betelgeuse is generally brighter than Antares. Betelgeuse is a red supergiant star in the constellation of Orion and is one of the brightest stars in the night sky, while Antares is a red supergiant in the constellation Scorpius and appears slightly dimmer than Betelgeuse from Earth's perspective.

I would like to explain that in fact, Betelgeuse is closer to 640 light-years away than it is to 425 ly. So, if it goes supernova tonight, the light from this massive explosion would take 640 years to get to Earth. So, we would observe this supernova only 640 years after it has actually happened.

The red giant star Betelgeuse is the bright reddish star at the "shoulder" of Orion, the Hunter. Orion is one of the most distinctive constellations in the winter sky, and is easily visible in the winter and early spring.

In this season, Orion is setting as the Sun goes down, and it will not be especially visible until the late fall again, when it will rise at sunset.