By measuring it....
the sun's radius is and half a million bigger than the radius of the sun.
The radius of the Sun is approximates 695 500 kilometers.
The sun's radius
The radius of Betelgeuse is 1180 times the radius of our sun.
Its radius is estimated to be about 300 times the radius of the Sun.
You can use kilometers. Or you can compare it to the radius of our Sun, and say, for example, "This star has 600 times the diameter [or radius] of our Sun."
The radius of the sun = 695,500 kilometers or 432,163.664 miles.
the sun's radius is and half a million bigger than the radius of the sun.
The radius of the Sun is approximates 695 500 kilometers.
The sun's radius
The radius of a circle is half the diameter.
The radius of the sun = 695,500 kilometers or 432,163.664 miles.
The radius of Betelgeuse is 1180 times the radius of our sun.
In order to conveniently compare the distances from the various planets, astronomers devised a measure called the "astronomical unit". The Earth is one AU from the Sun. In order to conveniently compare the sizes of other stars to our Sun, astronomers use a "solar mass" as the mass of the Sun. and a "solar radius" as the radius of our Sun. This helps to make the comparisons more obvious to non-astronomers.
Yes. The Wikipedia lists its diameter (or radius) as 950-1200 times that of the Sun. It is a variable star (its diameter changes); also it is hard to measure its diameter exactly.
Its radius is estimated to be about 300 times the radius of the Sun.
measure from the middle out to one side