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- The nebula is at a dist e Stars about 1344 ly bserve a star in the Oric ent magnitude of 6.75 m

- The nebula is at a dist e Stars about 1344 ly bserve a star in the Oric ent magnitude of 6.75 m

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1. The Orion Nebula is a gas-rich region in which stars are being born. The nebula is at a distance ofVariable Stars about 1344 lyr from Earth. Suppose you observe a star in the Orion Nebula to have an apparent magnitude of 6.75 mag. Calculate the absolute magnitude of the star. Also calculate the luminosity of theThe breakthrough in measuring distances to remote parts of our Galaxy, and to other galaxies as well, came star in units of the solar luminosity (knowing that the absolute magnitude of the Sun is 4.8 mag). Jfrom the study of variable stars. Most stars are constant in their luminosity, at least to within a percent or two. Like the Sun, they generate a steady flow of energy from their interiors. However, some stars are seen to vary in
Transcribed Image Text:1. The Orion Nebula is a gas-rich region in which stars are being born. The nebula is at a distance ofVariable Stars about 1344 lyr from Earth. Suppose you observe a star in the Orion Nebula to have an apparent magnitude of 6.75 mag. Calculate the absolute magnitude of the star. Also calculate the luminosity of theThe breakthrough in measuring distances to remote parts of our Galaxy, and to other galaxies as well, came star in units of the solar luminosity (knowing that the absolute magnitude of the Sun is 4.8 mag). Jfrom the study of variable stars. Most stars are constant in their luminosity, at least to within a percent or two. Like the Sun, they generate a steady flow of energy from their interiors. However, some stars are seen to vary in
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