Users' questions

What did Henry Russell discover?

What did Henry Russell discover?

American astronomer Henry N. Russell demonstrated how a star’s brightness is related to its spectral type in the so called Hertzsprung–Russell diagram, invented a method to compute the densities of binary stars, and shaped the development of contemporary astronomy by merging astronomy with astrophysics.

Who Is Henry Norris Russell and explain his contribution?

18, 1957, Princeton, N.J.), American astronomer—one of the most influential during the first half of the 20th century—who played a major role in the establishment of modern theoretical astrophysics by making physics the core of astrophysical practice.

Did Hertzsprung and Russell work together?

In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram. From 1919 to 1946, Hertzsprung worked at Leiden Observatory in the Netherlands, from 1937 as director.

Who is Henry Norris?

Henry Norris (or Norreys) (c. 1482 – 17 May 1536) was an English courtier who was Groom of the Stool in the privy chamber of King Henry VIII.

Why did Henry Norris Russell reject Cecilia Payne’s thesis?

Payne had a better knowledge of atomic spectra than most astronomers at the time. Payne concluded that, unlike on Earth, hydrogen and helium are the dominant elements of the Sun and stars. Henry Norris Russell strongly opposed this conclusion and convinced her to omit it from her thesis.

How did Annie Jump Cannon make the world a better place?

Known as the “census taker of the sky,” Annie Jump Cannon was a brilliant astronomer that revolutionized the way scientists classify stars. Not only did she develop the important Harvard spectral system, she also classified about 350,000 stars manually.

What is the meaning of Hertzsprung-Russell diagram?

Hertzsprung-Russell diagram, also called H-R diagram, in astronomy, graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types (temperatures). The Sun lies near the middle of the main sequence, and stars spend most of their lives on the main sequence.

What does the Hertzsprung-Russell diagram tell us?

The Hertzsprung-Russell Diagram is a tool that shows relationships and differences between stars. The position of each dot on the diagram tells us two things about each star: its luminosity (or absolute magnitude) and its temperature. The vertical axis represents the star’s luminosity or absolute magnitude.

Why was Henry Norris executed?

Incredulous, Norris frantically pleaded his innocence as he was arrested; however, he was found guilty of adultery and treason, and at the end of the episode he was beheaded alongside three other men accused of the same charge: Anne’s brother George, Mark Smeaton, and William Brereton.

What happened to Henry Percy?

This suggested that he was suffering from liver failure. Despite this in May 1536, he was forced to be a member of the jury that tried Anne Boleyn. Like the other peers he gave his verdict against her, then collapsed after sentence of death had been pronounced. Henry Percy died on 29th June 1537.

What stars are made of Cecilia?

In What Stars Are Made Of, Donovan Moore brings this remarkable woman to life through extensive archival research, family interviews, and photographs. Moore retraces Payne-Gaposchkin’s steps with visits to cramped observatories and nighttime bicycle rides through the streets of Cambridge, England.

What type of object will our sun ultimately become?

In approximately 5 billion years, the sun will begin the helium-burning process, turning into a red giant star. When it expands, its outer layers will consume Mercury and Venus, and reach Earth.

Where was Henry Norris Russell born and raised?

Russell was born on 25 October 1877, at Oyster Bay, New York, the son of Rev Alexander Gatherer Russell (1845-1911) and his wife, Eliza Hoxie Norris. He studied astronomy at Princeton University, obtaining his B.A.

How old was Henry Russell when he was born?

Russell was born on 25 October 1877, at Oyster Bay, New York, the son of Rev Alexander Gatherer Russell (1845-1911) and his wife, Eliza Hoxie Norris.

What are the two volumes of Henry Norris Russell?

There were two volumes: the first was The Solar System and the second was Astrophysics and Stellar Astronomy.

How did Henry Norris Russell contribute to stellar evolution?

Since a star’s chemical composition gradually changes with age (usually in a non-homogeneous fashion), stellar evolution results. Russell dissuaded Cecilia Payne-Gaposchkin from concluding that the composition of the Sun is different from that of the Earth in her thesis, as it contradicted the accepted wisdom at the time.