[escepticos] Re: [escepticos] nuevas hazañas de Octavio Aceves

["Susana Lopez" <slsanchez@...>]

Julius dixit:

Vean que espectacular noticia publicaba ayer El Correo
sobre uno de mis magufos-fetiche, el vidente alegre y
trotón Octavio Aceves.

"OCTAVIO LEVITA:,,,,,,,,,,,,
Sobrecogedoras declaraciones de Octavio Aceves sobre....


Susi dixit

Quiza nuestro querido magufo ha comunicado su secreto a la NASA y usara esta
tecnica para levitar ,Si quereis saber algo mas preguntarselo al propio
Octavio en el telefono 906428833

Saludos
Susi

Laser Levitation

Making and deploying something that large has been beyond the reach of
materials scientists up till now. Again the weight and volume dilemmas
reared their heads. Nothing compact enough to fit inside a reasonably sized
capsule was also durable enough to do the job.

Johnson and his fellow researchers are optimistic though about recent
breakthroughs with strong, lightweight composite materials. A leading
candidate for the sails is a carbon fiber fabric whose density is less than
2.8 grams (1/10 oz) per square meter; the equivalent of flattening a raisin
to cover that same area. Once in orbit, the compressed sail would unfurl
like a fan, cast wide by an expendable rocket.

More exciting than the compactness of this new material is the success
scientists have had with demonstrating its suitability for light-based
sailing. space.com has reported that at the end of last year engineers at
NASA's Jet Propulsion Laboratory (JPL) managed to hold aloft a swatch of the
cloth, purely by using a laser beam. The laser was aimed at a pendulum with
a scrap of the carbon mesh attached to its free end. A burst of light was
enough to deflect the pendulum upwards. By further adjustment of the laser,
the team was able to keep the swinging arm in a steady state of gravity
defiance; the first time this has ever been achieved.

Obviously, being on the receiving end of constant, focused laser radiation,
things get pretty warm. The reason why the interstellar pundits are
enthusiastic about this material then is because it can bear temperatures of
2,500° Centigrade (4,500° F). That's an increase of ten-fold on fabrics
manufactured only a year ago.

The Marshall Center is therefore leading NASA's transportation research for
potential future interstellar missions, and for maybe the first time, their
efforts are serious rather than hypothetical. The emphasis of their present
endeavours is on testing sail materials and planning precursor missions
within our own solar system. Such trips will set the stage (and the sails)
for voyages to other stars later this century.