EdEarl

From: https://www.facebook.com/photo.php?fbid=314601372011295&set=a.103481356456632.4989.100003843041121&type=1&ref=nf

Welcome to SFN, John. Enjoy.

Have a happy Friday. It's about 13 mins. Jump into the middle if you don't want to watch it all.

Courtesy Science is Awesome via Facebook

Hello Alex and Gregor. Welcome to SFN. Enjoy.

Welcome Kagen, enjoy.

A scientist is a group of atoms studying atoms. Do not trust atoms, they make up everything.

Welcome to SFN, enjoy.

SMath Studio is similar to Matlab, and SMath is free. Although, if you intend to use such a tool very much and can afford it, Matlab has more features.

One can read about, talk about, and think about a thing without ever truly understanding it; then, when one experiences something they understand what it is. For example, what is Chartreuse? 1. an aromatic liqueur, usually yellow or green, made by the Carthusian monks at Grenoble, France, and, at one time, at Tarragona, Spain.

Hi J. Welcome to SFN.

Thanks to Science is Awesome on facebook.

When there is a huge solar spill, it's just called a nice day.

An Englishman, a Frenchman, a Spaniard and a German are walking down the street together. A juggler is performing on the street but there are so many people that the four men can’t see the juggler. So the juggler goes on top of a platform and asks: “Can you see me now?” The four men answer: “Yes.” “Oui.” “Si.” “Ja.”

https://www.facebook.com/photo.php?fbid=616820255016317&set=a.465299380168406.106666.465298390168505&type=1&relevant_count=1&ref=nf

Sometimes I think the surest sign life exists elsewhere in the universe is that it has not tried to contact us. -- Bill Watterson

RE: Moontanman #1459 Evolution says, "Stupidity should be fatal."

Ouch https://www.facebook.com/photo.php?fbid=588844707813872&set=a.465299380168406.106666.465298390168505&type=1&ref=nf

https://www.facebook.com/photo.php?fbid=601208263244183&set=a.465299380168406.106666.465298390168505&type=1&relevant_count=1&ref=nf

https://fbcdn-sphotos-e-a.akamaihd.net/hphotos-ak-prn1/941320_582167838481559_1283226750_n.png

There are efforts to make ultra low cost housing. http://blogs.hbr.org/govindarajan/2011/07/the-300-house-businesses-take-1.html http://www.planetaryrenewal.org/ipr/ultralc.html http://www.i-domehouse.com/characters.html

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-prn2/971992_585197744845235_1140709989_n.jpg

On second thought, only a primary mirror is necessary. But, holding shape of mirror is a challenge.

Light puts pressure on the mirror, which your rocket must overcome, reducing efficiency. If you make both your primary and secondary mirrors with holes in the middle, you may be able to concentrate light on a circle on the outside of the engine and direct its exhaust through the mirror holes. Thus, combining light pressure on the primary mirror and engine exhaust to increase efficiency. The secondary mirror may be larger and more massive, which may offset the added efficiency. The mirror shapes are more difficult to design and may to difficult to build. My vision is a very short focal length with only two mirrors. Perhaps clever engineering can reduce total mass to near that of a three mirror system. The mirror math is beyond my capability.

Some carpet is made of plastic or similar synthetic fiber.