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Which star has a radius of 10 km?
That's the approximate radius of a neutron star, a.k.a. a pulsar.
What is the surface area of a star?
Roughly 12.57 times the square of its radius.
What is a hypergiant's radius?
A red hypergiant star could have a radius of up to 2000 solar radii or more, where one solar radius is the radius of our sun. If at the centre of our solarsystem, a hypergiant could extend out as far as Jupiter or more.
How do you measure a stars radius?
Calculating a star's radius is a somewhat lengthy process. You have to put together many tools that you have developed in various SkyServer projects. Even the largest star is so far away that it appears as a single point from the surface of the Earth - its radius cannot be measured directly. Fortunately, understanding a star's luminosity provides you with the tools necessary to calculate its radius from easily measured quantities. A star's luminosity, or total power given off, is related to two of its properties: its temperature and surface area. If two stars have the same surface area, the hotter one will give off more radiation. If two stars have the same temperature, the one with more surface area will give off more radiation. The surface area of a star is directly related to the square of its radius (assuming a spherical star). The luminosity of a star is given by the equation L = 4pR2s T4, Where L is the luminosity in Watts, R is the radius in meters, s is the Stefan-Boltzmann constant (5.67 x 10-8 Wm-2K-4), and T is the star's surface temperature in Kelvin. The temperature of a star is related to its b-v magnitude. for b-v value go to link The calculation is actually somewhat easier if we try to find the ratio of another star's radius to that of our Sun. Let Ls be the luminosity of the Sun, L be the luminosity of another star, Ts be the temperature of the Sun, T be the temperature of the other star, Rs be the radius of the Sun, and R be the radius of the other star. We can then write the ratio of their luminosities as L/Ls = (4pR2sT4)/(4pRs2sTs4) = (R/Rs)2(T/Ts)4 Solving for the ratio R/Rs yields R/Rs = (Ts/T)2(L/Ls)1/2 The temperatures can be found approximately from the table above by looking at the B-V values. To find the ratio L/Ls, we can use the absolute magnitudes of the stars. The magnitude scale is a logarithmic scale. For every decrease in brightness of 1 magnitude, the star is 2.51 times as bright. Therefore, L/Ls can be found from the equation L/Ls = 2.51Dm, where Dm = ms - m Let's look at the star Sirius. It has visual magnitude of -1.44, B-V of .009, and a parallax of 379.21 milli arc seconds. Finding its distance from its parallax yields d = 1/p = 1/.37921 = 2.63 parsecs. Its absolute magnitude is M = m - 5 log d + 5 = -1.44 - 5 log (2.63) + 5 = 1.46 We know the temperature of the Sun is 5800K. From the chart, the temperature of Sirius is about 9500K. Our Sun has an absolute magnitude of 4.83. The difference in magnitude is 3.37. Putting everything together yields R/Rs = (5800/9500)2(2.5123.37)1/2 = 1.76 Sirius has a radius approximately 1.76 times that of our Sun!
What are the angles of a regular 4 pointed star?
As far as I know, there is no "regular" 4 pointed star. However, if you have a 4 pointed star, you can draw a circle through it's inner points and a second circle around its outer points. If we say that the inner circle has radius "r" and the outer circle has radius "R", that the angle, "a", of the star's points are: a = atan(2r / (R√2 - r) If the outer circle is twice as big as the inner circle, this becomes: a = atan(2r / (2r√2 - r) = atan(2 / (2√2-1) = 47.5°
Is Pollux a white dwarf star?
No, Pollux is not a white dwarf, it is a orange giant star.
The star Pollux has a radius about how many times greater than the sun?
Approximately 8 times. See link for pictorial difference.
What galaxy is Pollux in?
The Pollux Star is located in the Beta Geminorum
What is the size of the pollux star?
The surface temperature of the Pollux star is 4,500 K
What is the galaxy of pollux?
Pollux is not a galaxy, but a star. Together with its heavenly twin, Castor, it is found in the constellation of Gemini.
What type of star is pollux?
Pollux (Beta Geminorum) is an orange giant star in the constellation of Gemini.It has a spectral type of K0
What is the beta star of the constellation Gemini the twins?
The beta star of Gemini is Pollux. The two bright stars of Gemini are Castor and Pollux. Although Pollux is the brightest star in Gemini, Castor was named alpha-Gemini (despite being second brightest), therefore, Pollux is beta-Gemini. Pollux is the one more southerly and easterly.
How far is the star pollux from the earth in kilometers?
Pollux is about 3.1957665 × 1014 kilometres from us
What is the distance of the star Pollux in the constellation Gemini?
Pollux is 34 light-years from Earth.
What is the shape of the star Pollux?
A square
What is the brightest star in Gemini?
Pollux, the head of the more easterly of the two twins (who is also named Pollux). Interestingly (and somewhat confusingly for people who think the designations run in order of brightness), Pollux is actually Beta Geminorum, not Alpha Geminorum (aka Castor).
Is a Aldebaran star the same as a pollux star?
No, they are not even in the same constellation.
