This fact is now known as Hubble's law, though the numerical factor Hubble found relating recessional velocity and distance was off by a factor of ten, due to not knowing at the time about different types of Cepheid variables.

Edwin Powell Hubble ( November 20, 1889 – September 28, 1953 ) was an American astronomer who played a crucial role in establishing the field of extragalactic astronomy and is generally regarded as one the most important observational cosmologists of the 20th century.

Hubble is generally mistakenly known for Lemaître's law or " Hubble's law " which was discovered by Georges Lemaître.

Hubble was born to an insurance executive, John Powell Hubble, and Virginia Lee James in Marshfield, Missouri, and moved to Wheaton, Illinois, in 1900.

Hubble also became a member of the Kappa Sigma Fraternity ( and in 1948 was named the Kappa Sigma " Man of the Year ").

In 1919, Hubble was offered a staff position in California by George Ellery Hale, the founder and director of the Carnegie Institution's Mount Wilson Observatory, near Pasadena, California, where he remained on the staff until his death.

Shortly before his death, Mount Palomar's giant reflector Hale Telescope was completed, and Hubble was the first astronomer to use it.

On his religious views, Hubble was raised as a Christian.

He was taken care of by his wife, Grace Hubble, and continued on a modified diet and work schedule.

It was detected using the Hubble UDF image.

Wilson telescope, Edwin Hubble was able to resolve the outer parts of some spiral nebulae as collections of individual stars and identified some Cepheid variables, thus allowing him to estimate the distance to the nebulae: they were far too distant to be part of the Milky Way.

The term " The Local Group " was introduced by Edwin Hubble in Chapter VI of his book The Realm of the Nebulae ( Hubble 1936, pp. 124 – 151 ).

This image spans about two light-years and was taken by the orbiting Hubble Space Telescope in 1999.

The primary source of verification of this expansion was provided by Edwin Hubble who demonstrated that all galaxies and distant astronomical objects were moving away from us (" Hubble's law ") as predicted by a universal expansion.

The companion star was resolved by the Hubble Space Telescope in 1995, when it was 70 astronomical units from the primary ; results were announced in 1997.

The Andromeda Galaxy, for instance, was referred to as the Andromeda Nebula before galaxies were discovered by Edwin Hubble.

The Hubble Space Telescope has a 2. 4 m ( 7 ft 10 in ) primary mirror. The correctly ground backup primary mirror built by Eastman Kodak for the Hubble space telescope ( the mirror was never coated with a reflective surface, hence its Honeycomb mirror | honeycomb support structure can be seen ).

Its companion Fomalhaut b was thought to be the first extrasolar planet ever detected by a visible light image, thanks to the Hubble Space Telescope, but infrared observations have since retracted this claim: it is instead a spherical cloud of dust.

It was to service the Hubble Space Telescope two more times, once in 2004, and again in 2005, but no more missions were planned for it again until 2009 when, on STS-144, it would retrieve the Hubble Space Telescope from orbit and bring it back to Earth.

Hubble Space Telescope and MOST have also found or confirmed a few planets.

Hubble also served in the U. S. Army at the Aberdeen Proving Ground during World War II.

Wilson, Hubble identified Cepheid variables ( a kind of star ; see also standard candle ) in several spiral nebulae, including the Andromeda Nebula and Triangulum.

Hubble also devised the most commonly used system for classifying galaxies, grouping them according to their appearance in photographic images.

Discovery also flew the Hubble Space Telescope into orbit.

The second and third Hubble service missions were also conducted by Discovery.

< imagemap > File: 1990s decade montage. png | From left, clockwise: The Hubble Space Telescope floats in space after it was taken up in 1990 ; American F-16s and F-15s fly over burning oil fields and the USA Lexie in Operation Desert Storm, also known as the 1991 Gulf War ; The signing of the Oslo Accords on 13 September 1993 ; The World Wide Web gains a public face during the start of decade and as a result gains massive popularity worldwide ; Boris Yeltsin and followers stand on a tank in defiance to the August Coup, which leads to the Soviet Union's dissolution on 26 December 1991 ; Dolly the sheep is the first mammal to be cloned from an adult somatic cell ; The funeral procession of Diana, Princess of Wales, who dies in 1997 from a car crash in Paris, and is mourned by millions ; Hundreds of thousands are killed in the Rwandan Genocide of 1994 .| 420px | thumb

The Hubble Space Telescope also showed that while many nebulae appear to have simple and regular structures from the ground, the very high optical resolution achievable by a telescope above the Earth's atmosphere reveals extremely complex morphologies.

Giacconi also applied his expertise to other fields of astronomy, becoming the first director of the Space Telescope Science Institute, the science operations center for the Hubble Space Telescope.

She was also the Principal Investigator the Nuker Team, which used the Hubble Space Telescope to search for supermassive black holes at the centers of galaxies.

It would also see the introduction of space based telescopes, such as the Hubble Space Telescope.

* Eagle Nebula ( also known as M16 ), an astronomical object the subject of a famous Hubble Space Telescope picture

Gold and Bondi also stated that the issues with time scale that had plagued other cosmological theories – such as the discrepancy between the age of the universe as calculated by Hubble and dating of radioactive decay in terrestrial rocks – were absent for the Steady State theory.

Delta Cephei is also of particular importance as a calibrator of the Cepheid period-luminosity relation since its distance is among the most precisely established for a Cepheid, thanks in part to its membership in a star cluster and the availability of precise Hubble Space Telescope / Hipparcos parallaxes.

Elliptical galaxies are ( together with lenticular galaxies ) also called " early-type " galaxies ( ETG ), due to their location in the Hubble sequence, and are found to be less common in the early Universe.

The museum also holds the backup mirror for the Hubble which, unlike the one that was launched, was ground to the correct shape.

He was also the first to derive what is now known as the Hubble's law and made the first estimation of what is now called the Hubble constant which he published in 1927, two years before Hubble's article.

Another record-holder for most distant object is a galaxy observed through and located beyond Abell 2218, also with a light travel distance of approximately 13 billion light years from Earth, with observations from the Hubble telescope indicating a redshift between 6. 6 and 7. 1, and observations from Keck telescopes indicating a redshift towards the upper end of this range, around 7.

Unique to universes described by the FLRW metric, a de Sitter universe has a Hubble Law which is not only consistent through all space, but also through all time ( since the deceleration parameter is equal to ), thus satisfying the perfect cosmological principle that assumes isotropy and homogeneity throughout space and time.

A spacewalk was also performed during the mission to evaluate tools and techniques for the STS-61 Hubble Space Telescope servicing mission later that year.

At UCSD she also helped develop the faint object spectrograph in 1990 for the Hubble Space Telescope.

While administrator, he also approved the Hubble Space Telescope program.

The mission also featured a test of a procedure that was later used during the second Hubble Space Telescope servicing mission to raise the telescope ’ s altitude without damaging the satellite ’ s solar arrays.