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June 9 in Physics History

Physics history will help you to develop a better understanding of the physics world!

birthdays & deaths

Explore all birthdays & deaths of physicists occurred on this day with their short biography!

physics Events

Know all important discoveries made by physicists & events happened on this day with complete information!

June 9 in Physics History - Births – Physicists born on June 9

Johann Gottfried Galle (9 Jun 1812 - 10 Jul 1910)

Johann Gottfried Galle (June 9 in Physics History)

He was a German astronomer who was the first to observe the planet Neptune. The existence of Neptune had been predicted in the calculations of Leverrier. Galle also discovered 3 comets while working at the Berlin Observatory. He discovered the inner C ring of Saturn while assisting Johann Franz Encke. He also gave the idea to use asteroids for the determination of solar parallax.

June 9 in Physics History - Deaths – Physicists died on June 9

Alvan Graham Clark (10 Jul 1832 - 9 Jun 1897)

Alvan Graham Clark

He was an American astronomer whose father’s firm of Alban Clark & Sons was a world-famous maker of lenses for refracting telescopes. He joined his father and brother. While he was testing a lens, he observed a faint twin star beside Sirius. He also discovered fourteen double stars. He made the world’s largest refractor after his father and brother died.

June 9 in Physics History - Events – Physics Events of June 9

Albert Einstein's New Research Paper

Albert Einstein (March 14 in Physics History)

Albert Einstein published the analysis of Max Planck’s quantum theory and its application to light in 1905. Annalen der Physik contained his article but no experimental work was involved.

Rocket Aircraft By Robert Goddard

Rocket Aircraft By Robert Goddard

A rocket-fueled aircraft design was patented by Robert Goddard in 1931. But, his innovative design drew no attention from the Army. The government also had limited resources to fund proper research after the Great Depression. His invention was designed to use the energy of the gas blast of a rocket to obtain the maximum propulsive effect.

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April 12 in Physics History

Physics history will help you to develop a better understanding of the physics world!

birthdays & deaths

Explore all birthdays & deaths of physicists occurred on this day with their short biography!

physics Events

Know all important discoveries made by physicists & events happened on this day with complete information!

April 12 in Physics History - Births – Physicists born on April 12

Edward Walter Maunder (12 Apr 1851 - 21 Mar 1928)

Edward Walter Maunder (March 21 in Physics History)

He was an English astronomer who first started the British Civil Services Commission examination for the post of photographic and spectroscopic assistant at the Royal Observatory, Greenwich. He worked at the observatory for the next forty years measuring the sunspots and checking historic records. He found a lack of reports on sunspots from 1645 to 1715. Instead of questioning this, he started researching and found that there are indeed decades-long times when the sun has very few sunspots. Now we call these periods as Maunder minima.

Ferdinand von Lindemann (12 Apr 1852 - 6 Mar 1939)

Ferdinand von Lindemann (April 12 in Physics History)

He was a German mathematician who proved that π is not a solution to any algebraic equation with a rational coefficient. This explained the insoluble natural or classical Greek mathematical problem of constructing a square with the same area as a given circle using a ruler and compasses alone. He discussed Hermite’s methods that he used to prove that ‘e’ is transcendental. He extended Hermite’s results in 1882 to show that π was also transcendental.

April 12 in Physics History - Deaths – Physicists died on April 12

Charles Messier (26 Jun 1730 - 12 Apr 1817)

Charles Messier (April 12 in Physics History)

He was a French astronomer who first compiled a systematic catalog of “M objects” and discovered 15 comets. His catalog contained nebulae, 103-star clusters, and galaxies. He concluded the alphanumeric names for objects like M1, M2, etc.

Geoffrey F. Chew (5 Jun 1924 - 12 Apr 2019)

Geoffrey F. Chew

He was an American physicist who led the group of S-matrix theorists researching the strong interaction and the bootstrap principle. He was a graduate student of Enrico Fermi. His group calculated the interactions of bound-states without assuming that there is a point-particle field theory underneath.

Igor Tamm (8 Jul 1895 - 12 Apr 1971)

Igor Tamm (April 12 in Physics History)

He was a Soviet physicist who shared the Noble Prize with Pavel A  Cherenkov, and Ilya M. Frank for physics for his works in explaining Cherenkov radiation. He developed the theoretical interpretation of the Cherenkov effect which states that the radiation of electrons moves faster than the speed of light through matter. He also developed a method for studying the interaction of nuclear particles and contributed towards the methods for the control of thermonuclear reactions.

April 12 in Physics History - Events – Physics Events of April 12

First Man To Orbit The Earth

Yuri Gagarin Quotes

On this day, Yuri Gagarin became the first man to orbit the Earth in 1961. The control of the spacecraft was locked to prevent him from taking control of the ship. It had a radio, television, and life-supporting equipment. He ejected and made a planned descent landing with his parachute but the Soviet Union denied this to save its reputation. After 7 years, he died in a plane crash.

Read Also: Top 15 Most Inspiring Yuri Gagarin Quotes

The First Yo-Yo Toy In Space

The First Yo-Yo Toy In Space (physics events of april 12)

The first yo-yo toy was taken into space in the Space Shuttle Discovery mission 51-D in 1985. With this yellow plastic Duncan Imperial yo-yo, other toys were exhibited during a time in orbit. Astronauts did the tricks with toys but the yo-yo sleeper trick couldn’t work without normal gravity. While spinning, the gyroscope showed exceptional stability. The flywheel slowed without normal gravity.

Space Shuttle Columbia Was Launched

Space Shuttle Columbia

Columbia, the American Space Shuttle was launched into space in 1981. John W. Young was the mission commander.

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