my 55th birthday present!

[james_davis_nicoll]

Cut in case

Comments

[desert_dragon]

Awesome! Happy Birthday!

[icecreamempress.livejournal.com]

That's absolutely lovely!

[jamoche]

Ooooh...

[burger-eater.livejournal.com]

Nice.

[pinkygirl97.livejournal.com]

It's a wonderful present.

[w. dow rieder (from livejournal.com)]

Nice! Looks like just the sort of thing I'd start to study while waiting for my dinner to cool down, and then wonder half an hour later why I was still hungry...

[jwaaaa.livejournal.com]

Great!

[spiralsheep.livejournal.com]

Lovely! Thank you for sharing the picture.

[thedabara-cds.livejournal.com]

This would have left my late Dad in AWE; he loved this sort of thing. Thanks for posting it!!

[fourth-moon.livejournal.com]

How very cool, thanks for sharing that! I wish it was bigger; even at this size it's fascinating. I was thinking about the mathmatics of slingshot navigation just a few days ago, and here it is, live and in color! (Okay, detailed and in color.) What a great gift, enjoy!

[timgueguen.livejournal.com]

But where's Death Probe?

(For the young'uns who don't get the reference http://bionic.wikia.com/wiki/Death_Probe )

[sean o'hara (from livejournal.com)]

A chart like that listing the delta-V necessary to go from planet to planet would be awesome. Especially if we forced every SF author to hang one over their desk.

[scott-sanford.livejournal.com]

You mean a schematic like this? It could only help. It would be nice to also give them some idea how deep gravity wells are; the two charts are not obviously similar to everyone.

[hand2hand.livejournal.com]

Fun!

Also, we are the same age exactly!

[awesomeaud.livejournal.com]

I love it! Where can I get one???