This toolkit adds custom functions usable in excel for various solar system parameters and physics constants

These can be incorporated into excel one of two ways:

This option ensures the functions are persistent across excel sessions

File needed: FESS_Constants.xlam

We're following the instructions under "Making your custom functions available anywhere" within https://support.microsoft.com/en-us/office/create-custom-functions-in-excel-2f06c10b-3622-40d6-a1b2-b6748ae8231f?ui=en-us&rs=en-us&ad=us

1. Save FESS_Constants.xlam to your computer.
2. Within Excel, click File > Options.
3. In the Excel Options menu, go to the Add-ins tab.
4. In the Manage drop-down list, select Excel Add-Ins. Then click the Go button.
5. In the Add-Ins dialog box, select the check box beside FESS_Constants, as shown below. If you don't see FESS_Constats, hit the Browse button and select the downloaded file, then ensure the added FESS_Constants option is checked.

This option will add the functions to a single workbook, but won't be available in other workbooks unless added again.

File needed: FESS_Constants.bas