ARTHUR'S FREE

Space Clipart

Free space clipart, images pictures, NASA, astronauts, American shuttle,  Columbia, Challenger, Discovery, and Atlantis, space station, moon, stars, planets is of large format and is suitable for presentations and projects and school usage for both students and educaters etc. The large images are too big for use on the internet. However you may use the thumbnail clip art pictures for web pages. Selections of both colour and black and white clip art are available, tha latter are suitable for coloring books. Please do not use them in any other collections of clipart.

                                                                    

Outer space (often called space) comprises the relatively empty regions of the universe outside the atmospheres of celestial bodies. Outer space is used to distinguish it from airspace and terrestrial locations. There is no clear boundary between Earth's atmosphere and space as the density of the atmosphere gradually decreases as the altitude increases. Nevertheless, the Fédération Aéronautique Internationale has established the Kármán line at an altitude of 100 kilometres (62 mi)) as a working definition for the boundary between aeronautics and astronautics. This is used because above an altitude of roughly 100 kilometres (62 mi), as Theodore von Kármán calculated, a vehicle would have to travel faster than orbital velocity in order to derive sufficient aerodynamic lift from the atmosphere to support itself. The United States designates people who travel above an altitude of 50 miles (80 km)) as astronauts. During re-entry, roughly 120 kilometres (75 mi) marks the boundary where atmospheric drag becomes noticeable, depending on the ballistic coefficient of the vehicle.

Contrary to popular understanding, outer space is not completely empty (i.e. a perfect vacuum,) but contains a low density of particles, predominantly hydrogen plasma, as well as electromagnetic radiation. Hypothetically, it also contains dark matter and dark energy.

NOT FOR COMMERCIAL USE

GO TO THE CLIPART

 

Mirror Site

Favorite Links

Privacy Policy 

Bibliography 

About

Home Page

Copyright and Disclaimer

Terms of Use

Last updated July 2014