"Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools."
--1921 New York Times editorial about Robert Goddard's revolutionary rocket work.
"Correction: It is now definitely established that a rocket can function in a vacuum. The 'Times' regrets the error."
NY Times, July 1969.
Sky Watcher Star Adventurer 2i Pro Pack – Motorized DSLR Night Sky Tracker Equatorial Mount for Portable Nightscapes, Time-Lapse and Panoramas Wi-Fi App Camera Control – Long Exposure (S20512)
Nice One
on Thu, 10/17/2013 - 1:47pm
- You s'd try OIII on M27
a lot of it
I'll have to buy one. The
on Thu, 10/17/2013 - 5:22pm
I'll have to buy one. The last one I had got delaminated, as did the one before that.
They were both Schuler..... cheap??
OIII Astronomik
on Fri, 10/18/2013 - 9:43am
Here OIII only M27
http://existentia.com/g2/v/t150/m27-o3-6h.jpg.html
I think I have this one
http://www.astronomik.com/en/photographic-filters/oiii-ccd-filter.html
I checked the oiii image.
on Sat, 10/26/2013 - 3:59pm
I checked the oiii image. Really something.