ScienCentral News
environment general science genetics health and medicine space technology March 03, 2003 
home NOVA News Minutes archive login

is a production of
ScienCentral, Inc.
Making Sense of Science

Also of Interest
Smart Ink (video)

Strong Stuff (video)

M.D. on a Chip (video)

Bio Detector (video)

Nano Designer (video)

Infector Detector (video)

Fancy Pants (video)

Clothes That Change Color (video)

High Tech Army Togs (video)

Galactic Real Estate (video)

Sound Shaper (video)

Virtual Reality and Vision (video)

Thinking Small (video)

2001: A Mars Odyssey (video)

NEARly Done

NOVA News Minutes
Visit the NOVA News Minutes archive.
ScienCentral News and Nature
Nature genome promo logo
Don’t miss Enter the Genome
our collaboration with Nature.
Best of the Web!
Popular Science Best of the Web 2000
Selected one of Popular Science’s 50 Best of the Web.
Get Email Updates
Write to us and we will send you an email when a new feature appears on the site.
Lift to the Heavens (video)
December 24, 2002

Can't see the movie above??
download realplayer logo
You can choose to either view it with a RealPlayer by clicking here. Or get the free QuickTime player to view the higher-quality video above.

Interviewees: Brad Edwards, HighLift Systems; Pulickel Ajayan, Rensselaer Polytechnic Institute.

Video is 1 min 39 sec long. Please be patient while it loads enough to start playing.

Produced by Ann Marie Cunningham

Copyright © ScienCentral, Inc., with additional footage from Dr. Hicham Fenniri (Purdue University), NASA Marshall Space Flight Center, Maison d'Ailleurs/House of Elsewhere Museum of Science Fiction, HighLift Systems, Inc., and Dr. Pulickel Ajayan (RPI).

Also on ScienCentral News

Thinking Small - Nanotechnology—with its ability to write pages of information on the point of a pin—has NASA scientists thinking small. Really small. (5/10/01)

Fly Me To The Moon - With advances in flight technology, the idea of anyone—not just trained astronauts—going beyond earth’s limits doesn’t seem so farfetched anymore. (2/24/00)

Elsewhere on the web

Space elevator takes off - BBC

Audacious & Outrageous: Space Elevators - NASA

Space Elevator: Next Stop, Earth Orbit -

Maison d'Ailleurs/House of Elsewhere - Museum of Science Fiction, Utopia and Extraordinary Journeys

Space Adventures, Ltd. - "end of year specials available now"

You've heard of wishing on a star. NASA looks up at the stars and wishes for an elevator that we could ride into space instead of big, expensive rockets.

As this ScienCentral News video reports, a farsighted few dream that an incredibly tiny, uniquely strong structure could make the space elevator real.

Press One for the Moon, Two for Mars

The notion of a space elevator was born in 1895, when a prolific Russian scientist and author, Konstanin Tsiolkovsky was inspired by the Eiffel Tower in Paris. Since then, the space elevator has resurfaced periodically in scientific journals and science fiction, most notably in Arthur C. Clarke's 1978 novel, The Fountains of Paradise.

Both NASA and the U.S. Air Force have mulled over the space elevator. In 2000, NASA Marshall Space Flight Center published the proceedings of a workshop on space-elevator design. The key question is how to build a cable capable of stretching from earth to space. Right now, no known material has the requisite strength and flexibility.

Three years ago, physicist Brad Edwards realized that proposals for the space elevator always envisioned "a very, very grand system, consistent with someone saying 120 years ago, 'I'm going to build a Boeing 747.’ A large system just isn't possible. However, we can cut it down to a mall system, which is viable with current technology." Edwards suggested that a yard-wide, paper thin, unbreakable ribbon cable could be constructed from a fiberglass-like composite, made with nanotechnology's major discovery to date: carbon nanotubes.

A carbon nanotube is a rolled-up sheet of graphite, a form of carbon that is very familiar to most people from broken pencils. However, at nanoscale, in the form of a single sheet, graphite is one of the strongest known substances, because the bonds among its atoms of carbon are so strong.

Carbon nanotubes were discovered in 1991 by Dr. Sumio Iijima's research group at NEC Corporation in Tokyo. These minute structures combine enormous strength with low weight and flexibility, making them ideal materials for use in space.

At the time of the discovery, Dr. Pulickel Ajayan was working with Dr. Iijima. Today Ajayan is a leading nanotubes researcher at Rensselaer Polytechnic Institute in Troy, N.Y. He has succeeded in creating strands of linked nanotubes, but only a few inches in length.

Dr. Ajayan is not optimistic about any space elevator offering rides in the near future. Despite nanotubes' exceptional properties, their very perfectness makes them difficult to control—even after more than a decade of research. At atomic level, their surfaces are almost entirely smooth, and that makes them very hard to use to construct anything. Dr. Ajayan says that even composites combining a polymer and nanotubes are a challenge because nanotubes are so hard to control: "It's not as simple as throwing carbon nanotubes into a polymer and getting the best out of it."

Meanwhile, Edwards remains unshakably optimistic. A former NASA official has put him in touch with engineer Robert Shambaugh at the University of Oklahoma, who is making composites from polyprophylene reinforced with carbon nanotubes.

by Ann Marie Cunningham

About Search Login Help Webmaster
ScienCentral News is a production of ScienCentral, Inc.
in collaboration with the Center for Science and the Media.
248 West 35th St., 17th Fl., NY, NY 10001 USA (212) 244-9577.
The contents of these WWW sites © ScienCentral, 2000-2003. All rights reserved.
The views expressed in this website are not necessarily those of the NSF.
NOVA News Minutes and NOVA are registered trademarks of WGBH Educational Foundation and are being used under license.