Does anyone know what font NASA use. Many thanks

i might know this. let me check. what are you making?

I think it was a custom made font by James Modarelli - back in 1958. Typophile's site is down right now, so I can't verify.

Meanwhile, this has been on DaFont a few times... here's one I chuckled over... got to love the Kat
http://www.dafont.com/forum/read/108757/nasa-font-from-this-logo

Yes, hand lettered by him without a close match to a font.
The reference to Kat's comparison is entertaining.
I tried to find a match but the closest I was able come was Priamos Heavy.
As can be seen from my comparison of the logo -- red line -- with Priamos Heavy -- black -- the fit is mainly in the weight. Everything else is different.

If anyone wants to try _NASA_ with Priamos Heavy go to
http://www.myfonts.com/fonts/ef-typeshop/priamos/heavy/
p.s. I wonder if Typophile will ever return. The promise of a "reboot" is almost a year old