:betelgeuse is about 887 times the diameter of the sun to 887 times, is now to the end of life, that millions of years in the future, may become ⅱ type ia supernovae.astronomers expect that betelgeuse will eventually end up with a type ii supernova, or that its mass is just enough to turn into a small black hole.but the parties to it and how long the life is not the consensus of opinion:some people think that the diameter of it constantly change represents the merging betelgeuse is its carbon atoms, and a supernova in thousands of years.people who disagree with this view think it can live longer.if a supernova occurs, its luminosity will increase to more than 100,000 times, about the luminosity of the moon.
canis major and sirius
canis major vy:is a located in canis major, red red supergiant, 4900 light-years from earth, its quality is about 17~ 25 times the mass of the sun, the radius of about 1420 times the radius of the sun.if you put big dog vy in the center of the solar system, its surface location will be outside saturn's orbit.the big dog vy is currently in a very unstable state, and it's a huge amount of material that's erupting into the surrounding cloud.astronomers using the hubble space telescope have predicted that it will end the star's life with supernovas in the next five to six million years.in theory supernovae produce gamma-ray bursts that can destroy parts of the galaxy and destroy life in nearby thousands of light-years.and the big dog vy has enough mass to form a black hole, which can be about 17 times the mass of the sun.
the andromeda:the andromeda galaxy with the milky way is in this group of galaxies, quality is the double of the milky way, the diameter is 2 times of the milky way, at least 220000 light-years in diameter, 2.54 million light-years from earth, is the nearest large galaxies from the milky way.the andromeda galaxy, the largest galaxy in the cluster, is moving toward the milky way at a rate of 300 kilometers per second, which could hit the milky way in between 30 and 4 billion years, and eventually form an elliptical galaxy.the andromeda galaxy looks like a spindle-shaped ellipse in the northeast, one of the remotest objects visible to the naked eye.
ic1101 compared with andromeda, the size of the milky way
ic1101:the largest galaxies in the universe is known, located about 10.45 light years from earth, abel 2029 galaxy clusters at the center of the galaxy, its diameter is about 6 million light-years away(including dizzy), equivalent to more than 20 times the diameter of the milky way, is the largest known galaxies.it is large enough to hold thousands of galaxies, and the data shows that the galaxy is 6 million light years in diameter.like most giant galaxies, ic1101 has a large number of metal-rich stars, some of which are 7 billion years older than the sun, and thus appear golden.its center has a very bright radio source that may be associated with a supermassive black hole of 400 to 100 billion solar masses.