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Comment Re:Who's up first? (Score 2) 205

The vortices of planes last a long time. At airports when you are dealing with the big planes they have to leave minutes later so that the vortices have time to dissipate. Otherwise there is severe turbulence for the next plane. Watch a plane coming down through fog and see how long it takes for it to settle down...

Comment Re:drafting... (Score 1, Informative) 205

It is drafting in a sense... The vortices off of the wings create a slight updraft which reduces the effort that the trailing birds need to expend. I think Mythbusters took this one on. There is an effect but the trailing plane has a very narrow margin that they have to stay within to see any benefit.
NASA

Submission + - 35 years later, Voyager 1 is heading for the stars (ajc.com)

DevotedSkeptic writes: "Thirty-five years after leaving Earth, Voyager 1 is reaching for the stars.

Sooner or later, the workhorse spacecraft will bid adieu to the solar system and enter a new realm of space — the first time a manmade object will have escaped to the other side.

Perhaps no one on Earth will relish the moment more than 76-year-old Ed Stone, who has toiled on the project from the start.

"We're anxious to get outside and find what's out there," he said.

When NASA's Voyager 1 and Voyager 2 first rocketed out of Earth's grip in 1977, no one knew how long they would live. Now, they are the longest-operating spacecraft in history and the most distant, at billions of miles from Earth but in different directions.

Wednesday marks the 35th anniversary of Voyager 1's launch to Jupiter and Saturn. It is now flitting around the fringes of the solar system, which is enveloped in a giant plasma bubble. This hot and turbulent area is created by a stream of charged particles from the sun.

Outside the bubble is a new frontier in the Milky Way — the space between stars. Once it plows through, scientists expect a calmer environment by comparison.

When that would happen is anyone's guess. Voyager 1 is in uncharted celestial territory. One thing is clear: The boundary that separates the solar system and interstellar space is near, but it could take days, months or years to cross that milestone.

Voyager 1 is currently more than 11 billion miles from the sun. Twin Voyager 2, which celebrated its launch anniversary two weeks ago, trails behind at 9 billion miles from the sun."

Submission + - FAA Creates Website for Reporting Laser-Strikes (star-telegram.com) 1

hutsell writes: "The Federal Aviation Administration has launched a website to report laser strikes on aircraft, which have rose from about 300 in 2005 to 3,129 as of Nov. 25. The FAA said major metropolitan areas report the highest number of laser strikes. The agency announced that it would impose civil penalties of up to $11,000 for people who point lasers at aircraft cockpits.

An excerpt FTA: When a laser beam broke the darkness and flooded the "bubble" of his helicopter, CareFlite pilot Scott Wallace got scared — afraid of being blinded and of crashing and dooming himself and the nurse and paramedic on board as well as anyone on the ground.

Then he got mad."

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