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Hertzsprung–Russell diagram - Wikipedia

en.wikipedia.org/wiki/Hertzsprung–Russell_diagram

An HR diagram showing many well known stars in the Milky Way galaxy. HR diagrams for two open clusters, M67 and NGC 188, showing the main-sequence turn-off at different ages. The Hertzsprung–R...

Introduction to the Hertzsprung-Russell Diagram

www.atnf.csiro.au/outreach/education/senior/astrophysics/stellarevolution_hrintro.html

One of the most useful and powerful plots in astrophysics is the Hertzsprung- Russell diagram (hereafter called the H-R diagram). It originated in 1911 when the ...

Hertzsprung-Russell Diagram | COSMOS

astronomy.swin.edu.au/cosmos/H/Hertzsprung-Russell Diagram

The Hertzsprung-Russell diagram (HR diagram) is one of the most important tools in the study of stellar evolution. Developed independently in the early 1900s  ...

H-R Diagram - Home Cornell Astronomy

astrosun2.astro.cornell.edu/academics/courses/astro201/hr_diagram.htm

The Hertzsprung-Russell Diagram is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and ...

Hertzsprung-Russell Diagram - UNL Astronomy

astro.unl.edu/naap/hr/hr_background3.html

That was not the case however, for the Hertzsprung-Russell diagram. A significant tool to aid in the understanding of stellar evolution, the H-R diagram was ...

The H-R Diagram - SDSS SkyServer

skyserver.sdss.org/dr1/en/proj/advanced/hr/

Find stars in the Sloan Digital Sky Survey's database of 13 million objects. Follow in the footsteps of famous astronomers as you learn how stars live and die.

An H-R Diagram of the Brightest Stars - SDSS SkyServer

skyserver.sdss.org/dr1/en/proj/advanced/hr/simplehr.asp

Once you know the luminosity and temperature (or color) of a star, you can plot the star as a point on the H-R diagram. Plot the luminosity on the y-axis with ...

HR Diagram

abyss.uoregon.edu/~js/ast122/lectures/lec11.html

These diagrams, called the Hertzsprung-Russell or HR diagrams, plot luminosity in solar units on the Y axis and stellar temperature on the X axis, as shown ...

HR Diagram - Jim Kaler

stars.astro.illinois.edu/sow/hrd.html

The classical HR diagram, first constructed in 1914 by Henry Norris Russell (to which was added the work of Ejnar Hertzsprung), is a plot of absolute visual ...

H-R Diagram | Las Cumbres Observatory

lco.global/spacebook/h-r-diagram/

H-R Diagram. Having the information about spectral types was useful, but astronomers wanted to look for trends in the data. In 1911 Ejnar Hertzsprung plotted ...