Extragalactic Cosmological Calculator, CosmiCalc.exe, Version 2.0 is now available.
It derives a number of physical properties of remote galaxies and quasars based on measurable data, such as redshift, apparent magnitude, and apparent diameter. Such data is readily available for all named objects at:
the SIMBAD Astronomical Database, http://simbad.u-strasbg.fr/simbad/
and at the NASA/IPAC Extragalactic Database (NED), http://ned.ipac.calt...rms/byname.html
The program is based on the equations in the CloudyNights.com series of articles titled Basic Extragalactic Astronomy. These equations are accurate within several percent of professional results for extragalactic objects which recede primarily by Hubble flow, or by the expansion of the Universe. They will not be accurate for nearby galaxies, like M31, whose motion relative to us is mostly due to their "peculiar velocity" through space.
The program is free and compatible with all Windows versions. It is self-contained, with no need for INI files or registry entries. It is "portable", which means it can be run from any location in the file system, including the Desktop, or from an external USB drive.
The program can be downloaded from Google Drive at
The sourcecode is available at
Suggestions for improving the program will be appreciated.
- scottinash likes this
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