How did Hubble prove the universe was expanding?

How did Hubble prove the universe was expanding?

Hubble’s brilliant observation was that the red shift of galaxies was directly proportional to the distance of the galaxy from earth. That meant that things farther away from Earth were moving away faster. In other words, the universe must be expanding.

What was Edwin Hubble’s big discovery?

Astronomer Edwin Hubble revolutionized the field of astrophysics. His research helped prove that the universe is expanding, and he created a classification system for galaxies that has been used for several decades.

What does Hubble’s law tell us about the universe?

Hubble’s law, which says simply that a galaxy’s velocity (or as is sometimes plotted, its redshift) is directly proportional to its distance, also tells us something important about the state of the universe. If the universe is static and unchanging, there should be no correlation between distance and velocity.

What evidence shows that the universe is expanding?

The spectral and temperature properties of distant light confirms that we live in expanding space. All of these pieces of evidence line up, teaching us that the Universe is expanding, and that’s the cause of the apparent recession, rather than any other explanation.

Will universe expand forever?

Confirmation of the Big Bang mostly depends on knowing the rate of expansion, average density of matter, and the physical properties of the mass–energy in the universe. There is a strong consensus among cosmologists that the universe is considered “flat” (see Shape of the universe) and will continue to expand forever.

Why does time stop in a black hole?

Near a black hole, the slowing of time is extreme. From the viewpoint of an observer outside the black hole, time stops. Inside the black hole, the flow of time itself draws falling objects into the center of the black hole. No force in the universe can stop this fall, any more than we can stop the flow of time.