By plotting the distance of eighteen galaxies against their red shifts, Hubble discovered a direct relationship: Galaxies were moving away from earth at a rate proportional to their distance from us. Hubble’s discovery was not just unexpected, but monumental.

What did Edwin Hubble discover about galaxies?

By plotting the distance of eighteen galaxies against their red shifts, Hubble discovered a direct relationship: Galaxies were moving away from earth at a rate proportional to their distance from us. Hubble’s discovery was not just unexpected, but monumental.

How many galaxies did Edwin Hubble discover?

46 galaxies
But the most astonishing discovery Hubble made resulted from his study of the spectra of 46 galaxies, and in particular of the Doppler velocities of those galaxies relative to our own Milky Way galaxy.

How was Edwin Hubble important to our understanding of galaxies?

Second, Hubble was the first to classify galaxies based on what he observed, from 1922 to 1923. He classified these based on shapes: elliptical, spiral, and irregular, called a galaxy’s visual morphology. Hubble’s classification led to his Hubble Galactic Tuning Fork or Hubble Sequence — how he thought galaxies evolve.

How did Edwin Hubble prove there were other galaxies?

Hubble went on to discover another couple of dozen galaxies. Before the 1920s were over, he added another astronomical achievement to his reputation. By analyzing the Doppler effect on the spectroscopic signals of receding stars, he established that their red shift was proportional to their distance.

Why is Edwin Hubble significant in the space world?

Like the Hubble Space Telescope, Edwin Hubble’s discoveries transformed the frontier of scientific knowledge. His work took us beyond the Milky Way and placed us in an ever-expanding universe with a myriad of galaxies beyond our own.

What did Edwin Hubble contribute to astronomy?

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.

Who found the galaxies?

The first galaxies were identified in the 17th Century by the French astronomer Charles Messier, although at the time he did not know what they were. Messier, who was a keen observer of comets, spotted a number of other fuzzy objects in the sky which he knew were not comets.

When did Edwin Hubble discover space?

On December 30, 1924, Hubble discovered the existence of other galaxies using the most advanced telescope in the world.

How did Edwin Hubble discover space?

1373 CincinnatiEdwin Hubble / Discovered

How did Edwin Hubble help discover energy?

He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology. Hubble proved that many objects previously thought to be clouds of dust and gas and classified as “nebulae” were actually galaxies beyond the Milky Way.

How did Edwin Hubble discovered that 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. He announced his finding in 1929.

What were Edwin Hubble’s two discoveries?

Hubble wanted to classify the galaxies according to their content, distance, shape, and brightness patterns, and in his observations he made another momentous discovery: By observing redshifts in the light wavelengths emitted by the galaxies, he saw that galaxies were moving away from each other at a rate constant to …

What are three galaxies Edwin Hubble identified?

The grouping of galaxies according to their shape. What are the three main types of galaxies that Edwin Hubble categorized? Elliptical, barred spiral and spiral. What is the difference between barred spiral and spiral galaxies?

What are the types of galaxies according to Hubble?

– Bars. Galaxies are divided on the basis of the presence or absence of a nuclear bar. – Rings. Galaxies are divided into those possessing ring-like structures (denoted ‘ (r)’) and those without rings (denoted ‘ (s)’). – Spiral arms. As in Hubble’s original scheme, spiral galaxies are assigned to a class based primarily on the tightness of their spiral arms.

How was Edwin Hubble discovered galaxies outside our own?

Hubble used the P-L relation to find the distance to the Cepheid he was studying in M31, and proved that it was located outside of our own Galaxy. This finally ended the debate on the nature of the spiral nebulae – they were indeed distant galaxies like our Milky Way.

What characteristic did Edwin Hubble use to classify galaxies?

The Hubble Classification scheme for galaxies, often referred to as the “tuning fork” diagram. Edwin Hubble originally identified an evolutionary sequence for the galaxies (from early-typeto late-type) as one moved from left to right across the diagram.