A circle with a radius of 1.8 km has a circumference of 11.31 km
radius = 48/2 = 24 km
Radius = approx 6050 km, so diameter = 12100 km.
A sphere with a radius of 687 km has a volume of 1,358,184,658.3 km3
C = 31.4 km
The sun has a radius of approximately 696,340 kilometers, while a star with 0.1 solar radius would have a radius of 69,634 kilometers. To calculate how many times larger the sun is, we divide the sun's radius by the smaller star's radius: 696,340 km / 69,634 km = 10. Therefore, the sun is 10 times larger than a star with 0.1 solar radius.
It has a radius of between 0.15 and 0.20 that of our Sun. The Sun has a radius of about 696,000 km, so Barnard's Star has a radius of between 104,400 km and 139,200. Average about 121,800 km
Neutrons star is the same size of a city. This is 10 km radius.
The diameter of the vega is 4315000 km
The largest known star "VY Canis Majoris" has a 987,600,000 km radius whereas the sun only has a puney 695,500 km radius.
The smallest object that can reasonably be called a "star" is a neutron star, which is pretty small but still much, much larger than a grape, at about 10-12 km radius.
The sun has a radius of approx 696,000 kilometres. By way of comparison, the earth's radius in 6,371 km.
Spica has a radius of about 5,150,400 km whereas the Sun has a radius of 696,000 km. So the "Spica Sun" would extend another 4,454,400 km into the Solar System.
The area of a circle with a radius of 10 km is πr^2, where r is the radius. In this case, the area would be approximately 314.16 square kilometers.
The radius of a G2III star can vary, but on average it is around 10 times the radius of the Sun. This class of star is typically larger and brighter than the Sun, but smaller than supergiant stars.
The average radius of Mars is about 3,389.5 kilometers.
2.5559 x 10^4 km