Hi Bill,

Jari Suomela sent me a great database he found. His description: "I
did a quick search for better data and I think I found a pretty good
source. It has over 1100 structures with varying degrees of
certainty." He attached a link
to http://koti.welho.com/jimenez/data/impacts.zip His .tdf works
great on Guide 8 and 9.

When you first open this new database, the screen is filled with
impact sites and their names. Zoom in a bit, left click on an impact
site to center it, right click and you get a location and a time
(neither relevant here). Left click Next and you get details on this
particular crater. Cllick More Info and you get the same data plus
links to Jari's site (well worth exploring) and a link to the source
of the impact data Jari found.

Would this be a good .tdf to add to the update?

Larry

At 06:36 PM 12/1/2011, you wrote:

>Hi Larry,
>
> > I realize there are very few users of Guide for historical research....
>
>There do seem to be a few out there, though. I occasionally learn
>that people are using the program in some ways I hadn't foreseen. There
>are a few people using Guide to check out historical eclipses, planetary
>alignments mentioned in ancient literature, one gent interested in
>checking out observations made by Kepler and Tycho Brahe... things of
>that ilk. It's one reason I added a "Local Apparent Time" entry to the
>Time Zone menu (LAT corresponds to "sundial time", with the sun due
>south of you at 12:00; it's what everyone thought of as "time" a
>thousand years or so ago, before good clocks were made.)
>
>Anyway, there's definitely enough interest in historical research to
>make it very much "on topic".
>
>-- Bill

Laren Dart
http://ldart.got.net


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