Space Flight by Light (Solar Sail)

"

The Planetary Society is preparing to launch a tiny satellite into orbit later this month as the first phase in testing a solar sail as a means of spacecraft propulsion — an idea that has been kicking around in the science (and science-fiction) literature for at least a century.

The satellite, LightSail, no larger than a loaf of bread, is contained within the somewhat larger Prox-1 satellite developed by the Georgia Institute of Technology. It is scheduled to liftoff aboard an Atlas V rocket on May 20.

The concept states that if a large enough, kite-like "sail" can be deployed in space, the pressure exerted by particles streaming from the the Sun (known as the "solar wind") could be used to push a spacecraft along, much the same way that a sailing vessel is propelled when heading downwind.

The first LightSail won't reach a high enough orbit to try out the sail in the solar wind, but it should be able to test the mechanism for deploying the 345-square foot tissue-thin Mylar sail. A mission set for next year should put a second LightSail in a high enough orbit to fully test the concept.

A decade ago, the Planetary Society, the non-profit founded by the late Carl Sagan and now headed by Bill Nye ("The Science Guy"), made its first attempt to launch a solar sail, but the satellite was lost when the Russian launch vehicle it was on failed to reach orbit."



http://www.npr.org/blogs/thetwo-way/2015/05/09/405506717/planetary-society-set-to-launch-solar-sail-experiment

Freddie Gray: a death unchallenged

The unjustified death of Freddie Gray cannot go unchallenged. This is a call for non-violent civil disobedience across the nation. It is evident the Police are covering up what occurred in this case. A person's neck does not spontaneously separate from one's spine, the condition the Police left Freddie Gray in resulting in his death. I am outraged!

"Baltimore 25-year-old Freddie Gray died of a severe spinal cord injury after police arrested him.

http://www.cnn.com/2015/04/23/us/baltimore-freddie-gray-death/

http://www.theatlantic.com/politics/archive/2015/04/the-mysterious-death-of-freddie-gray/391119/

http://www.washingtonpost.com/news/morning-mix/wp/2015/04/20/baltimore-police-freddie-gray-arrested-without-force-or-incident-before-fatal-injury

http://www.nytimes.com/2015/04/22/us/another-mans-death-another-round-of-questions-for-the-police-in-baltimore.html?_r=0

http://www.nytimes.com/2015/04/22/us/baltimore-police-officers-suspended-in-freddie-gray-inquiry-are-identified.html

Asteroid Within 745,000 Miles of Earth

A massive asteroid is set to safely pass Earth Monday. According to NASA scientists, the asteroid 2004 BL86 is approximately 1,500 feet across and will come closest to Earth at 11:19 a.m. ET.

The asteroid will be approximately 745,000 miles away - about three times the distance between the earth and the moon.

Experts at NASA's Near Earth Object Program believe the asteroid will not be visible to the naked eye. The asteroid is expected to be visible through small telescopes and strong binoculars.

The asteroid was discovered in 2004, and Monday's pass is believed to be the closest the asteroid will come to Earth for the next 200 years.

The Associated Press contributed to this report.

 

http://abcnews.go.com/Technology/massive-asteroid-2004-bl86-pass-745000-miles-earth/story?id=28478510