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Welcome to LightCone7, a flexible tabular cosmological calculator for the history and the future of expansion of the universe. Lightcone is based on the standard LCDM cosmic model. You specify the range and number of steps of a table and it gives you times and distances of the cosmic expansion history and/or future in that range. The calculator has various input data-sets to choose from, but the values can be adjusted as the user requires.

If you adjust the values T_H_{0}, T_H_{∞}, S_{eq} or Ω by any appreciable amount, you will be calculating for a different universe, not necessarily ours. It is best to leave them at one of the two default (WMAP or Planck) values for now, otherwise you may get results that are difficult to understand. You may want to play around with various stretch (S) ranges for your output table, though.

Further, the user can select various sets of output columns to tabularize over ranges of redshift (or Stretch) values. For more information, hover over the ? circles (tooltips) on the calculator. There is also a short user guide available at this Wiki.

This particular version, named LightCone 7zeit, is modified to output in the natural cosmological units of 1 zeit = T_H_{∞}, presently 17.3 Gy. Our present time is about 0.8 zeit on this scale. This gives values normalized around unity in the columns and is hence a lot easier to graph.

If you adjust the values T_H

Further, the user can select various sets of output columns to tabularize over ranges of redshift (or Stretch) values. For more information, hover over the ? circles (tooltips) on the calculator. There is also a short user guide available at this Wiki.

This particular version, named LightCone 7zeit, is modified to output in the natural cosmological units of 1 zeit = T_H

Display As:

Vert min | Vert max | Normalized units | ||

Hor min | Hor max | Set 'Number of Steps' above to at least 100 | ||

Vert marks | Hor marks | Divisions+1 | ||

Vert size | Hor size | Pixels | ||

Keep Open

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For the model used, see this Wiki. Click browser 'back' to return to this page.

Credits to Mordred and Marcus for invaluable inputs and to Coburt for a major reprogramming excercise.

Courtesy Relativity-4-Engineers