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| The Hubble Law using galaxies with |
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| visible
Cepheid variables. |
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| from a recent paper by Wendy Freedman and coworkers, |
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| using
the Hubble Space Telescope |
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| vr=Hd |
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| H is 75 km/s/Mpc |
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| Example: |
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| If galaxy is 10 Mpc away |
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| it is moving at 750 km/s |
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| If galaxy is moving at |
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| 1500 km/s |
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| it is 20 Mpc away |
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