Betelgeuse is one of the larger stars, while Barnard's star is just a little red dwarf star. So, yes- Betelgeuse is far larger than Barnard's.
Betelgeuse is much bigger than the Sun.
Rigel is brighter than Betelgeuse.
Betelgeuse is more luminous than Aldebaran.
Yes, it has a radius about 1000 times the radius of the sun.
No. The sun is actually hotter than Betelgeuse, but much smaller.
Betelgeuse is much bigger than the Sun.
Many stars are bigger, but Betelgeuse is one of them, a red giant.
Many stars are bigger, but Betelgeuse is one of them, a red giant.
No. The biggest star ever discovered is the VY Canis Majoris, a red hypergiant with a radius of easily 2000 times bigger than that of the Sun. That is more than twice the radius of Betelgeuse. Also, the mass of VY Canis Majoris is around twice that of Betelgeuse.
Rigel is brighter than Betelgeuse.
In general yes because Betelgeuse is only a single star, albeit a big one. Nebulae are huge clouds of gas within which stars form
Betelgeuse is more luminous than Aldebaran.
Yes, it has a radius about 1000 times the radius of the sun.
No. The sun is actually hotter than Betelgeuse, but much smaller.
No, it is not.
Betelgeuse has less than a million years left, which is a very short time for a star.
Not really. Its mass is 1.8 times that of the Sun, which is a mid-sized star. So while Altair is bigger than the Sun, it is not in the same category as Betelgeuse as an example of a giant star.