Betelgeuse is much bigger than the Sun.
betelgeuse
Size-wise, the Sun is to Betelgeuse as the Earth is to the Sun.
Yes, it has a radius about 1000 times the radius of the sun.
No. The sun is actually hotter than Betelgeuse, but much smaller.
If the star Betelgeuse replaced the Sun, most planets will be inside the star, even Jupiter. It would outshine the Sun like the Sun outshines the Moon.
betelgeuse
Many stars are bigger, but Betelgeuse is one of them, a red giant.
Size-wise, the Sun is to Betelgeuse as the Earth is to the Sun.
Many stars are bigger, but Betelgeuse is one of them, a red giant.
Yes, it has a radius about 1000 times the radius of the sun.
No. The sun is actually hotter than Betelgeuse, but much smaller.
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.
If the star Betelgeuse replaced the Sun, most planets will be inside the star, even Jupiter. It would outshine the Sun like the Sun outshines the Moon.
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.
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.
Yes, Betelgeuse has a radius about 1200 times the size of the sun, and Antares is about 800 times the radius of the sun.
Betelgeuse.