Geography

Geography, 18.07.2019 11:20, Aidanme25

Why does the earth seem to be at the center of the hubble expansion?

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Physics, 03.07.2019 00:10, elijahbravo4334

Edwin hubble famously discovered that distant galaxies are increasingly redshifted the further they are from the earth. although hubble himself was vocal in his belief that the universe was not expanding and insisted his results only displayed apparent recession of distant objects, we now know that the universe is indeed expanding and the apparent recession discovered by hubble is a physical recession due to an overall expansion of the universe as predicted by einstein’s theory of general relativity. the recession velocity is proportional to the position according to hubble’s law \vec{v_i}=h_0\vec{r_i} where h_0 is hubble’s constant, and \vec{r_i} are measured with earth at the origin of the spherically symmetric coordinate system. show that in choosing a different location for the origin, hubble’s law still applies, which implies that we are not the center of the universe (as much as we like to think we are).

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Physics, 16.07.2019 23:00, genaro19

The center of the hubble space telescope is 6940 km from earth’s center. if the gravitational force between earth and the telescope is 9.21 × 104 n, and the mass of earth is 5.98 × 1024 kg, what is the mass of the telescope? round the answer to the nearest whole number.

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Physics, 31.07.2019 04:30, fool2639

The hubble telescope the hubble telescope is a large telescope that orbits earth. it was named after edwin hubble. hubble was an astronomer. the hubble was launched in 1990 by nasa, the united states' space program. it uses a 94- inch mirror to collect light. data are sent back to earth by radio. since it is above earth's atmosphere, it gives us clearer pictures of space than telescopes on earth can. it can also see farther. with this powerful tool, we've learned a lot about the universe. what scientists have learned from the hubble the hubble has allowed us to watch stars form. it also has let us see into distant galaxies. we've been able to test our ideas. for example, before the hubble, black holes were just a theory. we didn't know for sure that they existed. the hubble has shown us evidence of black holes in space. the telescope has us find places to land data-gathering robots on mars. we've used it to track the paths of comets. we've also been able to see volcanoes erupt on 10, one of jupiter's moons. telescopes that are larger than the hubble are now being created but the hubble is the first of its kind. why does being in outer space make hubble a better telescope?

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Physics, 22.10.2019 06:00, ellieflores8400

Which sentence explains why optical land telescopes are not able to take images as clear as those taken by the hubble space telescope? hubble takes pictures of planets, stars, and galaxies. the mixture of gases that surround a planet is called its atmosphere. earth’s atmosphere changes and blocks some of the light that comes from space. hubble orbits high above earth and its atmosphere. so, hubble can see space more clearly than telescopes on earth can. hubble is not the kind of telescope that you look through with your eye. hubble uses a digital camera to take pictures. then, hubble uses radio waves to send the pictures through the air back to earth.

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