This section offers FREE files that you may download. These are all freeware
that I use frequently and have found to be useful. I have either found
these in the public domain on the web, created them myself, or compiled existing
data into an electronic format, with credit given within the file to the data's
original author (if known).
Use these files and programs at your own risk. I have verified that
they're all virus free. I will not be held responsible, in any way, for
damage that occurs from their use.
Spreadsheets for Download
These require Microsoft Excel 98 or later to read. Alternatively,
you can use OpenOffice.org
as a very functional, free alternative to Microsoft Excel. You can use
it to exchange files with people running Word and Excel. It works
under Linux and other OS's to give you a way to use Excel spreadsheets.
(Comparison of telescopes, costs, other factors to consider when considering
a new telescope)|
(Lat/Long satellite information)|
(Cost estimator for building a portable observatory)|
(Technical data on the planets)|
(Closest stars, other data on our stellar neighborhood)|
(The Messier listing in Excel format)|
(The Messier listing in .pdf format)|
(A master spreadsheet I made for tracking progress towards the
Astronomical League Messier Observer award. Columns for all required
data and automatic counter. Sort by any column.)|
Messier files and info|
Programs / Databases
These require Microsoft Windows 95 or later to run.
(Astronomy Clock program - Universal TIme and others)|
(Track the satellites of Jupiter - Less useful than Astronomy Magazine or
Sky & Telescope's charts, but still interesting)|
(Galaxy simulation program - interesting to see the dots 'orbit')|
(Useful utility that brings up a small display with the current phase of the Moon)|
(How to calculate focal length, secondary mirror placement, baffling.
Great Amateur Telescope Making file)|
(The Ultimate Messier Object Locator - A must have program!)|
(Use this program to UNZIP the zipped files listed on this site)|