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An astronomy prof who teaches at a University in Iowa
maintains a resource page of online astro java applets
for students and general public to use
and one of the applets is "cosmology calculator"
http://www.earth.uni.edu/~morgan/ajjar/Cosmology/cosmos.html
Here is her homepage
http://www.earth.uni.edu/smm.html
If you try out the "cosmology calculator" and want it to give mainstream consensus answers similar to Ned Wright's and so on, then leave the Hubble parameter 70 (the default)
and put 0.27 in for the matter density ("omega")
and put 0.73 in for the cosmo. const. ("lambda")
Then every time you put in a redshift z (like z = 6.4 for a recently observed quasar) and press "calculate" it will tell you
how far away the thing was when it emitted the light we are now receiving from it
how far away it is now
how fast it was receding from us when it emitted the light we are now receiving
maintains a resource page of online astro java applets
for students and general public to use
and one of the applets is "cosmology calculator"
http://www.earth.uni.edu/~morgan/ajjar/Cosmology/cosmos.html
Here is her homepage
http://www.earth.uni.edu/smm.html
If you try out the "cosmology calculator" and want it to give mainstream consensus answers similar to Ned Wright's and so on, then leave the Hubble parameter 70 (the default)
and put 0.27 in for the matter density ("omega")
and put 0.73 in for the cosmo. const. ("lambda")
Then every time you put in a redshift z (like z = 6.4 for a recently observed quasar) and press "calculate" it will tell you
how far away the thing was when it emitted the light we are now receiving from it
how far away it is now
how fast it was receding from us when it emitted the light we are now receiving
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