Month: July 2020

Édouard Roche

Jovan Stosic July 23, 2020

Édouard Albert Roche (French: [edwaʁ albɛʁ ʁɔʃ]; 17 October 1820 – 27 April 1883) was a French astronomer and mathematician, who is best known for his work in the field of celestial mechanics. His name was given to the concepts of the Roche sphere, Roche limit, and Roche lobe. He also was the author of works in meteorology.

https://en.wikipedia.org/wiki/%C3%89douard_Roche

Édouard Roche was last modified: July 23rd, 2020 by Jovan Stosic

Roche limit

Jovan Stosic July 23, 2020

In celestial mechanics, the Roche limit, also called Roche radius, is the distance within which a celestial body, held together only by its own force of gravity, will disintegrate due to a second celestial body’s tidal forces exceeding the first body’s gravitational self-attraction. Inside the Roche limit, orbiting material disperses and forms rings, whereas outside the limit material tends to coalesce. The term is named after Édouard Roche (pronounced [ʁɔʃ] (French), /rɔːʃ/ rawsh (English)), who was the French astronomer who first calculated this theoretical limit in 1848.

https://en.wikipedia.org/wiki/Roche_limit

Roche limit was last modified: July 23rd, 2020 by Jovan Stosic

Yuri Kondratyuk

Jovan Stosic July 23, 2020

Yuri Vasilievich Kondratyuk (real name Aleksandr Ignatyevich Shargei, Russian: Алекса́ндр Игна́тьевич Шарге́й, Ukrainian: Олександр Гнатович Шаргей) (21 June 1897 – February 1942) was a Soviet engineer and mathematician. He was a pioneer of astronautics and spaceflight, a theoretician and a visionary who, in the early 20th century, developed the first known lunar orbit rendezvous (LOR), a key concept for landing and return spaceflight from Earth to the Moon. The LOR was later used for the plotting of the first actual human spaceflight to the Moon. Many other aspects of spaceflight and space exploration are covered in his works.

Kondratyuk made his scientific discoveries in circumstances of war, repetitious persecutions from authorities and serious illnesses.

“Yuriy Kondratyuk” is a stolen identity under which the author was hiding after the Russian revolution and became known to the scientific community.

https://en.wikipedia.org/wiki/Yuri_Kondratyuk

Yuri Kondratyuk was last modified: July 23rd, 2020 by Jovan Stosic