See Also: Jeans, Sir James (Hopwood)(encyclopedia)
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thermosphere (iou) and Jeans, Sir James (Hopwood) (sh)


thermosphere (iou)



thermosphere noun. E20.
[from THERMO- + -SPHERE.]
a. The part of the atmosphere below about 8 km in which air density is largely dependent on temperature. rare. Only in E20.
b. The part of the atmosphere between the mesopause and the height at which it ceases to have the properties of a continuous medium, characterized by an increase of temperature with height. M20.
The warmer upper part of the ocean. M20.
thermo'spheric adjective L20.

Jeans, Sir James (Hopwood) (sh)




born Sept. 11, 1877, London, Eng.
died Sept. 16, 1946, Dorking, Surrey

British physicist and mathematician.

After teaching at Cambridge and Princeton, he worked as a research associate at the Mount Wilson Observatory (1923-44). He proposed that matter was continuously created throughout the universe (see steady-state theory). He wrote on a wide variety of phenomena but is perhaps best known as a writer of popular books about astronomy.