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jackyjack
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It has been found that, on average; galaxies are moving away from Earth at a speed that is propotional to their distance from Earth and that speed is called: Recessional Speed. Recessional speed v of a galaxy a distancce r from Earth is given by v = H.r;
where H = 1.58e-18 (1/s) is called Hubble constant. There are 2 galaxies that have distances from Earth are: 5.00e22 (m) nd 2.00e25 (m). If the galaxies at each of these distances had traveled at their recessional speeds, how long ago would they have been at our location?
where H = 1.58e-18 (1/s) is called Hubble constant. There are 2 galaxies that have distances from Earth are: 5.00e22 (m) nd 2.00e25 (m). If the galaxies at each of these distances had traveled at their recessional speeds, how long ago would they have been at our location?