File:Leavitt 1912 figures 1&2.png

Original file (866 × 431 pixels, file size: 106 KB, MIME type: image/png)

Captions

English

Add a one-line explanation of what this file represents

DescriptionLeavitt 1912 figures 1&2.png	English: Figures 1 and 2 from "Periods Of 25 Variable Stars In The Small Magellanic Cloud," Harvard College Observatory Circular 173. Figure 1 shows the relationship between the stars' maximum and minimum magnitudes (apparent brightness) and the periods of the stars, in days. Figure 2 shows the same relationship, but in terms of the logarithm of the period length. Since all the stars in the Small Magellanic Cloud are about the same distance from Earth, the log linear relationship between brightness and apparent magnitude discovered by Miss Leavitt also hold for the stars' absolute brightness, allowing stars of this class to be used as a measuring rod for galactic and intergalactic distances.
Date	3 March 1912
Source	http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1912HarCi.173....1L&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf
Author	Henrietta Swan Leavitt, William Pickering

Public domain	This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.	United States
	This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	21:59, 25 July 2015		866 × 431 (106 KB)	Cmdrjameson (talk \| contribs)	Compressed with pngout. Reduced by 120kB (53% decrease).
	22:43, 23 December 2014		866 × 431 (227 KB)	ArnoldReinhold (talk \| contribs)	{{Information \|Description ={{en\|1=Figures 1 and 2 from "Periods Of 25 Variable Stars In The Small Magellanic Cloud," Harvard College Observatory Circular 173. Figure 1 shows the relationship between the stars' maximum and minimum magnitudes (appar...

You cannot overwrite this file.

There are no pages that use this file.