After two years of unremitting effort, Payne built a temperature scale for stars versus their absorption intensities allowing her to calculate the abundances of chemical elements. She was amazed when she discovered:
regardless of spectral type, stars all had similar compositions
.
What new at the time scientific theory did Cecilia Payne bring to her astrophysics research at Harvard?
When Cecilia Payne began her study of stellar spectra, scientists believed that
the relative abundance of elements in the atmospheres of the Sun and the stars was similar to that in Earth’s crust
. … Payne met Saha when he visited Harvard, just as his work was becoming known to astronomers.
Who discovered hydrogen in the universe?
Cecilia Helena Payne-Gaposchkin
(née Payne;May 10, 1900 –December 7, 1979) was a British-born American astronomer and astrophysicist who proposed in her 1925 doctoral thesis that stars were composed primarily of hydrogen and helium.
Who discovered stellar spectra?
| Name Spectral class Spectral characteristics | Hot emission line stars Of, Be, Ae Bright hydrogen emission lines |
|---|
Where did Cecilia Payne grow up?
Cecilia Payne was born and raised by a widower in
Wendover, England
. She was the eldest of three children who belong to an upper-class family. Their father, Edward, was a fellow of Oxford University, a musician, historian, barrister, and a judge. Cecilia developed a passion for music from her father.
Where does hydrogen come from in the universe?
Hydrogen is found
almost everywhere in the universe
. It occurs between and within stars, and in the enormous gas and dust clouds that exist throughout interstellar space
Who named oxygen?
Among them was the colorless and highly reactive gas he called “dephlogisticated air,” to which the great
French chemist Antoine Lavoisier
would soon give the name “oxygen.”
What spectral classification is the hottest star?
The spectral sequence is also a colour sequence:
the O- and B-type stars
are intrinsically the bluest and hottest; the M-, R-, N-, and S-type stars are the reddest and coolest.
What class are the hottest stars?
- O stars are the hottest, with temperatures from about 20,000K up to more than 100,000K. …
- B stars have temperatures between about 10,000 and 20,000K. …
- A stars have strong absorption lines of Hydrogen. …
- F stars are slightly hotter than the Sun.
Why did Cecilia Payne move to the US?
Payne realized that her only career option in the U.K.
was to become a teacher
, so she looked for grants that would enable her to move to the United States.
Why is Cecilia Payne important?
7, 1979, Cambridge, Mass., U.S.), British-born American astronomer who
discovered that stars are made mainly of hydrogen and helium and established that stars could be classified according to their temperatures
. Payne entered the University of Cambridge in 1919.
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.
Why are hydrogen cars not used?
Hydrogen in vehicles
must be compressed
in expensive high-pressure tanks, which requires — you guessed it — energy. Current hydrogen vehicles use fuel cells to convert the chemical energy to power. Fuel cells are very costly because they are complex and require expensive materials such as platinum.
Is there hydrogen on the moon?
The Moon is much smaller than Earth, and its gravity is not strong enough to retain a gaseous atmosphere permanently. … As such,
hydrogen is found in the lunar regolith
Does space have oxygen?
In space,
there is very little breathable oxygen
. … This prevents the oxygen atoms from joining together to form oxygen molecules. That’s why astronauts need to wear a spacesuit when they are outside the spacecraft.
