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en.wikipedia.org/wiki/Hertzsprung%E2%80%93Russell_diagram

HR diagrams for two open clusters, M67 and NGC 188, showing the main- sequence turn-off at different ages. The HertzsprungRussell diagram, abbreviated H–R diagram or HRD, is a scatter plot of stars ... A peculiar characteristic of this form of the H–R diagram is that the temperatures are plotted from high temperature to ...

answers.yahoo.com/question/index?qid=20060730082243AAVi1ig

The Hertzsprung-Russell diagram (usually referred to by the abbreviation H-R diagram or HRD, also known as a Colour-Magnitude (CM) ...

www.atnf.csiro.au/outreach/education/senior/cosmicengine/stars_hrdiagram.html

In an H-R diagram the luminosity or energy output of a star is plotted on the vertical ... in the magnitude of a star when measured through two different coloured filters. ... Stars of similar size, temperature, composition and other properties have ...

www.answers.com/Q/What_two_caracteristics_of_a_star_are_plotted_on_the_Hertzsprung-Russell_diagram

Brightness and Temperature are the two characteristics plotted on the H-R diagram a diagram used to plot the absolute magnitude of stars and their ...

wps.prenhall.com/esm_tarbuck_escience_11/32/8328/2132150.cw/content/index.html

Question 2. Stars with surface temperatures between 5000 and 6000 K (Kelvin) appear .... The two properties of a star that are plotted on an H-R diagram are.

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

The Hertzsprung-Russell diagram (HR diagram) is one of the most important tools in ... it plots the temperature of stars against their luminosity (the theoretical HR diagram), ... Also plotted are the Morgan-Keenan luminosity classes that distinguish ... the evolution of stars, or to investigate the properties of a collection of stars.

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

They found that when stars are plotted using the properties of temperature and ... named after the two discovering astronomers, Ejnar Hertzsprung of Denmark ... The majority of these stars when plotted on an H-R diagram go down from left to ...

astro.physics.uiowa.edu/~kaaret/s09/L12_starsmainseq.pdf

Stars. • Classifying stars: HR diagram. • Luminosity, radius, and temperature ... We now have two properties of stars that we ... If we plot lots of stars on the HR.

www.e-education.psu.edu/astro801/content/l4_p6.html

During roughly the same time period, two astronomers created similar plots ... In a true HR diagram, you would plot the effective temperature of a star on the ...