Title Great Heroes and Discoveries of Astronomy. Episode 4, The Heroic Discovery of Other Galaxies. [Kanopy electronic resource]

Publication Info.	The Great Courses, 2021.
	[San Francisco, California, USA] : Kanopy Streaming, 2022.

To Access:
Available on Kanopy
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Bookmark link: https://library.naperville-lib.org:444/record=b3246058~S1

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Description	1 online resource (streaming video file) (25 minutes): digital, .flv file, sound
	digital
	video file MPEG-4 Flash
Note	Title from title frames.
	Film
	In Process Record.
Performer	Emily Levesque
Event	Originally produced by The Great Courses in 2021.
Summary	How did Henrietta Swan Leavitt, the prolific discoverer of variable stars, make sense of "Cepheid variables"? How did she calculate the relationship between their periods and their true luminosities? How did Edwin Hubble use Leavitt's work (known as the Leavitt law) to measure the distance to the Great Andromeda Nebula in the 1920s?
System Details	Mode of access: World Wide Web.
Subject	Astronomy.
	Technology.
	History, Modern.
	Computer science.
	Physics.
Genre	Education films.
Added Author	Great Courses, The, film director.
	Levesque, Emily, actor.
	The Great Courses (Firm), Distributor.
	Kanopy (Firm), Distributor.
Music No.	13413056 Kanopy

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