You observe a star orbiting in the outer parts of a galaxy. The distance to this galaxy is known, and you are able to take a spectra of this star and determine its velocity. The star is 19 kpc from the galaxy center and moving in a circular orbit with speed 382 km/s. Compute the total mass of the galaxy internal to the star's orbit. You will get a large number; express it in scientific notation and in units of solar masses (e.g., 4.2e10].
You observe a star orbiting in the outer parts of a galaxy. The distance to this galaxy is known, and you are able to take a spectra of this star and determine its velocity. The star is 19 kpc from the galaxy center and moving in a circular orbit with speed 382 km/s. Compute the total mass of the galaxy internal to the star's orbit. You will get a large number; express it in scientific notation and in units of solar masses (e.g., 4.2e10].
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![You observe a star orbiting in the outer parts of a galaxy. The distance to this galaxy is known, and
you are able to take a spectra of this star and determine its velocity. The star is 19 kpc from the
galaxy center and moving in a circular orbit with speed 382 km/s. Compute the total mass of the
galaxy internal to the star's orbit. You will get a large number; express it in scientific notation and in
units of solar masses [e.g., 4.2e10].
[Hint: there is a Box in Chapter 22 of your textbook that will be of help. See also the course formula
sheet.]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3a74cc31-62f4-4982-89c3-ce8d7d2cfbb2%2Fb622d7e3-0ac5-482e-9f39-11854ef35084%2Fbhfn5q_processed.jpeg&w=3840&q=75)
Transcribed Image Text:You observe a star orbiting in the outer parts of a galaxy. The distance to this galaxy is known, and
you are able to take a spectra of this star and determine its velocity. The star is 19 kpc from the
galaxy center and moving in a circular orbit with speed 382 km/s. Compute the total mass of the
galaxy internal to the star's orbit. You will get a large number; express it in scientific notation and in
units of solar masses [e.g., 4.2e10].
[Hint: there is a Box in Chapter 22 of your textbook that will be of help. See also the course formula
sheet.]
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