Imagine the Universe!

Using the relationship between density, mass and volume to solve for the Star's mass

Density is the amount of matter in a given volume. Density is a characteristic property of matter. This means that density can be used to identify a sample of matter and the size of your sample will not change your result. Density is determined by dividing the mass of a substance by the volume occupied by that mass.

density = mass/volume

If you know the volume and density of an object, a simple rearrangement of the above equation wil let you calculate it's mass.

mass = (density)(volume)

Data Click here to start by finding the volume of Cyg X-1.
Experiment Click here to return to the beginning and try a different experiment

Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Nicholas White (Director), within the Laboratory for High Energy Astrophysics at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Jim Lochner
All material on this site has been created and updated between 1997-2004.

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