Still, Betelgeuse is a red supergiant star that has lived hard and will die young. It's just some 10 million years old — ...

However, while the occultation of a star by an asteroid is typically a millisecond event, Betelgeuse is enormous—about 750 times the sun’s diameter. So, over about 12 seconds, the asteroid ...

We compared a population of pre ... The first direct image of a star other than our sun, taken with the Hubble Space Telescope. ... [+] Betelgeuse is an enormous star in the constellation Orion.

This happens on the Sun, too, with convection cells the size of Texas, but the process is much more violent on Betelgeuse, ...

It is 8.6 light-years away from Earth. Sirius is slightly more than twice the mass of the sun and just less than twice its diameter.