**Solar radius of a star Physics Forums**

30/03/2010 · Best Answer: If the star is a main sequence star, you can make a "guess" at the radius from knowing only the effective (surface) temperature. For stars like the sun, R/Rsun = (T / 5770K)^1.125 For stars either much brighter or much dimmer than the sun, R/Rsun = (T / 5770K)^1.548... This method is used to find planets around other stars. When a star has a planet, the system's centre-of-mass is not exactly at the centre of the star. (For example the centre-of-mass of the Solar system is close to the surface of the Sun.)

**How to Calculate Stellar Radii Sciencing**

Luminosity is the total energy that a star produces in one second. It depends on both the radius of the star and on its surface temperature. One can calculate luminosity by finding the product of 1) how much energy each section of the surface of a star is producing (? T 4, the Stefan-Boltzmann Law) and 2) the entire surface area of the star... Luminosity & Radius of Star For simplicity, let's figure out the luminosity for stars that are larger and smaller than our Sun, but with the same surface temperature as the Sun. If you know the radius of any star relative to the Sun's radius, you can figure the star's luminosity relative to solar luminosity.

**PaulAnthonyWilson.com » The exoplanet transit method**

The mass of the star is slightly more in a neutron star but the radius drops dramatically. It is only about 10 kilometers as compared to a normal star which has a radius of about 500,000 kilometers. The formula for density is mass/volume so the smaller the radius, the larger the density. how to get discipline in your life The Physics of Neutron Stars Alfred Whitehead Physics 518, Fall 2009 The Problem Describe how a white dwarf evolves into a neutron star. Compute the neutron degeneracy pressure

**Power output of a star schoolphysics Welcome**

Globular clusters A globular cluster is a collection of tens of thousands to hundreds of thousands of stars, all orbiting around their common center of mass, packed within a region several parsecs in radius. how to get started on medifast diet The mass of the star is slightly more in a neutron star but the radius drops dramatically. It is only about 10 kilometers as compared to a normal star which has a radius of about 500,000 kilometers. The formula for density is mass/volume so the smaller the radius, the larger the density.

## How long can it take?

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## How To Find The Radius Of A Star

Using equation 4.6 all we need in order to calculate the intrinsic luminosity of a star is its effective temperature and its radius. In practice this equation is not used to determine the luminosity of most stars as only a few hundred stars have had their radii directly measured.

- 17/11/2009 · A star's surface sends out energy in form of electromagnetic radiation and has an emissivity close to 1. Find the solar radius of Rigel that emits energy at a rate of 2,7 * 10^32W and has a surface temperature of 11000K.
- How do we find the masses of distant objects? We can calculate the mass of a distant star by _____. ANSWER: Hint 6. How do we determine the radius of a distant star? The most common way of determining a star’s radius is to _____. ANSWER: ANSWER: mass radius distance sending space probes that carry thermometers into the photosphere studying the Sun’s color and spectrum applying …
- The unit distance u is the shortest distance used in construction of a particular star. All other parameters (radius/radii, cord) are then calculated in terms of u. This is new {Sep 2012}
- 30/03/2010 · Best Answer: If the star is a main sequence star, you can make a "guess" at the radius from knowing only the effective (surface) temperature. For stars like the sun, R/Rsun = (T / 5770K)^1.125 For stars either much brighter or much dimmer than the sun, R/Rsun = (T / 5770K)^1.548