Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

We are all now connected by the Internet, like neurons in a giant brain.

 

Stephen Hawking

 

Where Do You Draw the Line Between the Sky and Space?

RATE THIS! +13
Posted in Science on 13th Aug, 2014 09:38 PM by AlexMuller

On his 108-minute flight in 1961, the Soviet cosmonaut Yuri Gagarin, the first human in space, reached a peak altitude of 327 kilometres (203 miles), after blasting off the planet atop a mighty Vostok rocket. After launch shook his tiny capsule violently, Gagarin experienced the feeling of weightlessness, and saw the curvature of the Earth first-hand.

 

By all accounts, he crossed the mysterious border between the Earth and space. Or did he? It has been more than half a century since Gagarin's historic journey, but there is still no universally accepted definition of where space begins. The International Astronautical Federation marks the beginning of space, for aviation purposes, at the 100-kilometre mark, where the Earth's atmosphere is so negligible that conventional aircraft cannot travel fast enough to generate aerodynamic lift.

 

There are other, more arbitrary numbers: In the 1960s, eight US pilots earned their astronaut wings by flying the arrow-shaped X-15 rocket plane above 80 kilometres. In the US, this standard still applies, meaning that any American who flies on one of Virgin Galactic's private spacecraft will officially become an astronaut.

 
Recent scientific discoveries have further muddled our terrestrial-celestial border confusion. In 2009, an instrument called the Suprathermal Ion Imager (SII) pinpointed 118 kilometres as the point at which charged particles from space begin to overwhelm the relatively mild particle flow of the Earth's upper atmosphere.
 
That was the point, researchers argued, where space really begins. Headlines hailing the discovery of the 'edge of space' briefly splashed across the media, but the attendant stories were hesitant, bracketing any notions of finality with alternative edge-of-space definitions.

Tags: spaceEarthatmosphereaviationrocket

Read original article » Back to category

Comments

Author: Guest
Posted: 2014-08-14
+1
An interesting consideration - sky or space? After all there are always undisputed measurements that state precisely the distance in meters Reply


 

Recent headlines

  • Posted in Science on 2017-08-16 23:13:20
    There’s a lot of money up for grabs if you can land.....read more
    Posted in Medicine on 2017-08-16 18:10:10
    3D printing living tissues to form living structures..read more
    Posted in Medicine on 2017-08-16 18:07:30
    algorithm can spot depression based on your Instagram posts..read more
    Posted in Business on 2017-08-16 18:03:59
    Ethereum sets new transaction record, outperforming Bitcoin..read more
    Posted in Medicine on 2017-08-15 17:58:46
    'Fat but fit' still risk heart disease..read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Newly discovered biomarkers may lead to promising diagnostic.....read more
    Posted by AlexMuller
    Understanding cell segregation mechanisms which help prevent.....read more
    Posted by AlexMuller
    Unique features of individual brains captured..read more
    Posted by AlexMuller
    Lutein, found in leafy greens, may counter cognitive aging..read more
    Posted by AlexMuller
    New surgical strategy offers hope for repairing spinal injuries..read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me