How big is A قیفاووس V V?

KY Cygni is 200,000 times more luminous than the Sun, and the Sun is pretty luminous, isn't it? The Sun is so luminous you aren't supposed to look at it! However, it's okay to look at KY Cyngi because it is 300 million times farther away.

Though stars can live for trillions of years, Betelgeuse is so big that it will only live for just over 8 million years. Since it is that old, it could explode at any moment! When it explodes, the supernova will be visible during the day. More likely however, it'll explode thousands of years from now.

Antares is a red supergiant very near the ecliptic, so it gets occulted (blocked) by the Moon quite often. Also, Antares weighs septillions of tons and is losing weight through solar wind, but this method is slow. The fast way is to explode, which it'll do later.

VY Canis Majoris is one of the largest known stars. It is so large that if it were placed in the Solar System, it would extend beyond the orbit of Saturn! It would take a plane 800 years to circle it once.

I know... you're thinking, "WOH... that's a big star!" Well, I guess you're right, because it's one of the biggest known stars. WOH G64 is found in the Large Magellanic Cloud. There is a cloud surrounding the star that extends half of a light-year.

Neptune is the most distant known planet in the solar system. The distance from Neptune to the Sun is greater than the diameter of any known star!