Carl Sagan // Current TV

A Nuclear Clash Could Starve the World By Causing Nuclear Famine

CNN... . A nuclear clash could starve the world By Jayantha Dhanapala and Ira... more

EthicalVegan
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From the AHA Archives: Carl Sagan’s 1981 Humanist of the Year Speech

Listen to famed astronomer Carl Sagan accept the AHA’s Humanist of the Year... more

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Evolution Under a Temperamental Sun

Philadelphia Inquirer... . Monday, March 19, 2012 Evolution Under a... more

EthicalVegan
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Puny Krauthammer ambushes a science giant

Then, from bad logic he shifts to chicanery, as my research failed to establish where... more

hoosierdaddy
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5 months ago
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A new 'Cosmos' will be on TV

Three decades after Carl Sagan's original "Cosmos," a new version is... more

pjacobs51
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5 months ago
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Happy Birthday, Carl Sagan

Today is the birthday of a great scientist and a great man. Carl Sagan instilled a... more

JanforGore
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7 months ago
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Pale Blue Dot - Animation

I have always thought of Carl Sagan's writings as "scientific poetry"... more

pjacobs51
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1 year ago
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The Frontier Is Everywhere

Narration by: Carl Sagan Music by: Michael Marantz... more

pjacobs51
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Happy Carl Sagan Day!!!

Centered around what would have been his 76th birthday (November 9), this year we... more

joeeddy
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1 year ago
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Consider Again That Pale Blue Dot

This video is the successor to the first Carl Sagan tribute, A Universe Not Made For... more

putdownmypants
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1 year ago
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The Sound of God

Maybe there is some cosmic catalog of consciousness which remembers us all after... more

wakitu
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we are an inconspicous point of reflected light-Carl Sagan

more stars than grains of sand the entire Earth http://www.wimp.com/starssand/

cyman01
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2 years ago
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Earth-the pale blue dot

the world in perspective-some great film clips during narration... more

cyman01
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2 years ago
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Current Virals 10/20

These are your Current Virals for 10/20. Check out the latest virals at... more

joshuaheller
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2 years ago
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we are a small insignicant planet inhabited by less people than there are galaxies

quotes from carl sagan............click on the link if the vid doesn't play

cyman01
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2 years ago
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FAILING*ENGLISH | Episode 005, Can't Stop the Signal

This week's funniest videos! See the baby from Nirvana's album cover for... more

failingenglish
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2 years ago
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Planetary Society to Launch Three Separate Solar Sails

On the 75th anniversary of astronomer Carl Sagan's birth, the Planetary Society announced their plans to sail a spacecraft on sunlight alone by the end of 2010. Called LightSail, the project will launch three separate spacecraft over the course of several years, beginning with LightSail-1, which will demonstrate that sunlight alone can propel a spacecraft in Earth orbit. LightSails 2 and 3, will travel farther into .

Sagan, co-founder of the Planetary Society was a long-time advocate of solar sailing.

On today's 365 Days of Astronomy podcast, Sagan’s widow and collaborator, Ann Druyan said this project is a "Wright Brothers Kitty Hawk-type" enterprise of inventing and proving a new way of moving through the cosmos.

"On one episode of Cosmos, we wrote 'We have lingered too long on the shores of the cosmic ocean. It's time to set sail for the stars,'" she said. "And that's what I was thinking when it became clear that we had the resources to mount this expedition, that we are serious at The Planetary Society. And at Cosmos Studios, my company which provided the principal support for the first 10 years of this project, we're really serious about giving our kids a future in which science and technology is used in its most wise and benign and forward-looking possible way.

That's why I'm so thrilled and I just think if Carl were alive he would have been absolutely overcome at the notion that The Planetary Society is mounting its own space program, let alone its own launch."

The solar sail project was boosted by a one-million-dollar anonymous donation.
Taking advantage of the technological advances in micro- and nano-spacecraft over the past five years, The Planetary Society will build LightSail-1 with three Cubesat spacecraft. One Cubesat will form the central electronics and control module, and two additional Cubesats will house the solar sail module. Cameras, additional sensors, and a control system will be added to the basic Cubesat electronics bus.

Reflected light pressure, not the solar wind, propels solar sails. The push of photons against a mirror-bright surface can continuously change orbital energy and spacecraft velocity. LightSail-1 will have four triangular sails, arranged in a diamond shape resembling a giant kite. Constructed of 32 square meters of mylar, LightSail-1 will be placed in an orbit over 800 kilometers above Earth, high enough to escape the drag of Earth’s uppermost atmosphere. At that altitude the spacecraft will be subject only to the force of gravity keeping it in orbit and the pressure of sunlight on its sails increasing the orbital energy.

Lightsail-2 will demonstrate a longer duration flight to higher Earth orbits. LightSail-3 will go to the Sun-Earth Libration Point, L1, where solar sails could be permanently placed as solar weather stations, monitoring the geomagnetic storms from the Sun that potentially endanger electrical grids and satellite systems around Earth.

The Planetary Society’s attempt in 2005 to launch the world's first solar sail, Cosmos 1, was scuttled when its launch vehicle, a Russian Volna rocket, failed to reach Earth orbit.

http://www.universetoday.com/2009/11/09/planetary-society-to-launch-three-separate-solar-sails/On the 75th anniversary of astronomer Carl Sagan's birth, the Planetary Society... more

pjacobs51
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2 years ago
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Jack White's Third Man Records to release Stephen Hawking/Carl Sagan - featuring Auto-Tune mix on Vinyl

'A Glorious Dawn' is a tribute to fellow astronomer Carl Sagan' Jack... more

sk8r408
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2 years ago
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It might be possible to colonize Venus With Floating Cities

Seemingly, people in the space community have a tendency to push the boundaries of... more

Octoguy
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3 years ago
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5 comments

Travis Barker Betrayed Balloon Boy

Today we're serving up another science music remix with Symphony of... more

Current_Virals
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2 years ago
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