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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°
What is the size of pollux?
Pollux is a red giant star and is estimated to be around 8.8 times the size of our Sun. Its radius is approximately 72 million kilometers.
How big is pollux?
Pollux is a bright giant star in the constellation of Gemini. It has a radius about 8.9 times that of the Sun, making it a quite large star. Its size is a result of its advanced evolutionary stage and the processes happening in its core.
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?
Pollux is a red giant star in the constellation of Gemini. Its size is approximately 8.8 times the diameter of the Sun.
What is the galaxy of pollux?
Pollux is a star in the constellation of Gemini, approximately 34 light-years away from Earth. It is not a galaxy, but rather a binary star system consisting of a bright giant star and a fainter companion star.
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
Is Pollux a white dwarf star?
No, Pollux is not a white dwarf star. It is an orange giant star that is nearing the end of its life cycle. White dwarfs are remnants of stars like the Sun after they have exhausted their nuclear fuel.
Which star is hotter vega or pollux?
Vega is hotter than Pollux. Vega is a high-temperature class A star, while Pollux is a cooler class K star. This difference in temperature is reflected in their respective colors, with Vega appearing bluish-white and Pollux appearing reddish-orange.
