Betelgeuse

Brightness is a function of a stars luminosity as observed from Earth.

So our Sun is the brightest.

Vega has an apparent magnitude of: 0.03

Betelgeuse has an apparent magnitude of 0.42

So, in apparent magnitude, Vega is brighter.

No, Betelgeuse is not the oldest star. It is a relatively young star in astronomical terms, estimated to be around 8 to 8.5 million years old. The oldest stars in the universe are typically found in globular clusters and are over 10 billion years old.

If the Sun was replaced by Orion's star Betelgeuse , its size would completely engulf the earth. Also it would extend past the orbit of Jupiter, and most of the planets would be inside the star including Jupiter. Betelgeuse would outshine the Sun like our Sun outshines the Moon. Unfortunately the Earth would have a "Front Row Seat" when the Red SuperGiant blows itself into oblivion. The explosion would be so bright that the star in Orion (constellation) which is 640 Light Years away. Days would still change from day into night, but for a few weeks or so it would appear like there are two Suns in the sky.

this is what would happen when Betelgeuse explodes :)

The answer is unknown because it's precise distance from our solar system has never been determined so getting a size estimate is problematic, at best. Estimates range from 160 to 1200 light years distance with 600-700 light years being the most accepted distance. It is estimated that Betelgeuse is only 1 million years old and will go nova within the next 1 million years.

1. Betelgeuse is a red supergiant star located in the constellation of Orion.
2. It is one of the largest stars known, with a diameter estimated to be around 1,000 times that of the Sun.
3. Betelgeuse is nearing the end of its life cycle and is expected to explode in a supernova in the relatively near astronomical future.

It is impossible to say when it will explode. It seems very unstable and many astronomers think it may be soon. But soon in astronomical terms could be a million years from now, or it could happen next week.

Yes, Betelgeuse is a red supergiant star located in the constellation of Orion. It is one of the brightest stars in the night sky and is easily visible to the naked eye. Betelgeuse is nearing the end of its life and is expected to explode in a supernova in the future.

Betelgeuse is bigger than Aldebaran. Betelgeuse is a red supergiant star, while Aldebaran is an orange giant star. Betelgeuse is one of the largest stars known, with a diameter around 1,000 times larger than the Sun.

No, there are many other red giant stars in the Universe. Betelgeuse and Aldebaran are well-known red giants because they are bright and easily visible from Earth, but there are numerous others that exist both within our own galaxy and beyond.

It's possible, yes. Betelgeuse is a red giant star that is going through the last stages of life, as viewed from earth. The light from the star takes several hundred years to reach us though, so it's possible that the star has already come to the end of it's life in that time. When it comes to the end of it's life it will explode in a supernova explosion. We should be able to see this from earth, the explosion would be so bright that we could see it during the day.

Betelgeuse has a diameter of approximately 700 million miles.

No one really knows, because no one has ever been to Betelgeuse. It would take much more time than getting to Pluto.

No planet could ever come close to the size of Betelgeuse.

Betelgeuse is a red supergiant star located in the constellation of Orion. It is one of the brightest stars visible to the naked eye and is nearing the end of its lifecycle. Betelgeuse is expected to explode as a supernova in the relatively near future, although the exact timing is uncertain.

Betelgeuse, a red supergiant star in the constellation of Orion, appears in the southwestern part of the sky as seen from Earth, in the Northern Hemisphere. The exact direction varies depending on the time of year and time of night, but it is generally visible in the evening during the winter months.

Betelgeuse does not orbit anything itself. It is a red supergiant star located about 700 light-years away in the constellation of Orion. It is a solitary star that does not have a companion star that it orbits around.

Betelgeuse is expected to go supernova within the next 100,000 years, although this estimate has a wide margin of error. When Betelgeuse does explode, it will briefly outshine the moon in our night sky and likely be visible during the day.

If I wrote out that distance in miles, there would probably be more digits than I could fit in this typing box. If you measure it in light years instead, I think it is a few hundred of those.

The constellation named after the mythical hunter is Orion. Betelgeuse is one of the brightest stars in the constellation, marking Orion's left shoulder. Orion is known for its distinctive shape resembling a hunter holding a bow and arrow.

Betelgeuse is a red supergiant star located in the Orion constellation. Its light exhibits a small Doppler shift due to its motion relative to Earth, but this shift is not significant compared to its overall distance and size. The Doppler shift of Betelgeuse's light is mainly influenced by its own pulsations and variations in brightness.

Betelgeuse is a red supergiant located in the upper-right region of the Hertzsprung-Russell (H-R) diagram. It is a cool and bright star, indicating its position as a giant star in the later stages of its life cycle.

As of now, the Hubble Space Telescope has been used to study Betelgeuse, a red supergiant star in the constellation of Orion. It has provided important insights into the star's behavior and characteristics.

Betelgeuse is only about 10 million years old - and is close to death already.

It has already exhibited, an expansion and contraction of it's outer shell, which is a sure sign, that it will soon (astronomically) come to a final end as a supernova.

Betelgeuse does not have any planets in orbit around it. It is a red supergiant star located in the constellation of Orion, about 643 light-years away from Earth. It is nearing the end of its life cycle and is expected to explode in a supernova in the future.