How many times is Sirius bigger than the sun?

Sirius is five times bigger than the sun. Sirius is the brightest star in the night sky, almost twice as bright as the second brightest star. However, it is still not as bright as the moon, Venus or Jupiter, and Mercury and Mars are occasionally brighter than Sirius. Sirius is a blue and white main sequence star accompanied by a white dwarf star, and the center of mass of the system is about 8.6 light years away from the Earth. Sirius B, the companion of a white dwarf, is the earliest observed white dwarf and one of the largest white dwarfs.

Under proper environmental conditions, Sirius can even be seen with the naked eye when there is the sun. Of course, the sky must be very clear, the altitude of the observation site must be very high, the sun should be low on the horizon, and Sirius should be overhead, which is very rare.

The basic composition of Sirius.

Sirius was originally composed of carbon and oxygen, which were produced by helium fusion in the death star that formed Sirius B. These elements were covered with lighter elements and layered according to mass, because the surface gravity of Sirius B was high. So Sirius B's outer atmosphere is almost pure hydrogen, which is the lightest element in the universe, and no other elements can be found in the spectrum. Sirius appeared in the earliest astronomical records and was regarded as "Sophodet" by the ancient Egyptians.