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Manoharan Karthigasu
277 followers -
Parent - Educator - Technologist
Parent - Educator - Technologist

277 followers
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L2, great conference with a lot learning opportunities especially in the area of technology. This years theme: Disrupt Rethink Change
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03/10/2015
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A fantastic idea Carl Sagan showed Johnny Carson in 1976 is about to become reality. Bill Nye is testing a spaceship that rides on sunbeams. His LightSail project uses solar sails for propulsion.

LightSail is like something out of a science fiction novel. The silvery material unfolds into a space-age version of a fabric sail. Then the sun pushes it forward, using the natural momentum of its photons. The force is small, but continuous. "With a chemical rocket, there's a big boom, a phwooosh, the ground shakes, but then nine minutes later you're done and you're coasting all the way to Pluto," Nye said. "With these kind of sails, the propulsion doesn't just stop. It's on day and night -- except wait, there's no night!"

Back in 1976, famed physicist and astronomer Carl Sagan​ appeared on The Tonight Show to explain a new method of space travel. Using a technique called solar sailing, Sagan described a craft that used a large reflective sheet to "work exactly as a sailboat does," harnessing radiation from the sun to travel around our solar system. Now, almost forty years later, a solar-sailing spacecraft like the one Sagan described is about to have its first test flight.

The privately funded LightSail project is the creation of The Planetary Society — the non-profit group founded by Sagan and other astronomical luminaries, and currently headed by Bill Nye The Science Guy​ — and aims to offer a demonstration of the potential of solar sailing as a faster and cheaper method of space propulsion than chemical rockets with two small spacecraft built by Stellar Exploration Inc. The first of these is tentatively scheduled to launch on May 20th. The Mylar sail is being tested as a propulsion source for CubeSat, a tiny spacecraft used for low-cost space experiments. May's test won't push the LightSail-hosting CubeSat out of Earth's gravity, but The Planetary Society hopes to test the mechanisms that would allow a more robust launch to send a solar-powered craft out into space. If the sail deploys correctly, they can move on to funding a full mission.

References: 
http://www.planetary.org/blogs/jason-davis/2015/20140424-lightsail-readiness-tests.html
http://www.washingtonpost.com/news/speaking-of-science/wp/2015/05/06/a-fantastic-idea-carl-sagan-showed-johnny-carson-in-1976-is-about-to-become-reality/
http://www.theverge.com/2015/5/7/8564119/bill-nye-lightsail-project-solar-sail-test-flight

#space   #astronomy   #sciencesunday  

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All App'd Out! Thanks for some great sharing +Taufeek Irawan. Thank you to the rest for attending.
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4/20/15
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How to be a Hangout Pro...

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Amazing...
how the human face forms in the womb.  :)

Clip is from the 1 minute BBC video at https://www.youtube.com/watch?v=wFY_KPFS3LA.  The human face forms in between the 2nd and 3rd months of a pregnancy. :)  
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2 pages of Google Greatness included!

101 Practical Ways to Ditch That Textbook, a FREE ebook. 

Download here: http://ditchthattextbook.com/2015/03/26/free-ebook-101-practical-ways-to-ditch-that-textbook/
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Whether you're jotting down a shopping list or putting ideas together for your next novel, Google Keep helps you capture your thoughts in the form of notes. Starting today, when you visit http://keep.google.com, you can export notes to Docs to expand, edit, and polish your ideas.
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Thank you guys for an enlightening conversation. Hope to see everyone in BSD soon.
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Great stuff.

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