- published: 04 Sep 2015
- views: 59698447
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft. While generally reserved for professional space travelers, the terms are sometimes applied to anyone who travels into space, including scientists, politicians, journalists, and tourists.
Until 2002, astronauts were sponsored and trained exclusively by governments, either by the military, or by civilian space agencies. With the sub-orbital flight of the privately funded SpaceShipOne in 2004, a new category of astronaut was created: the commercial astronaut.
The criteria for what constitutes human spaceflight vary. The Fédération Aéronautique Internationale (FAI) Sporting Code for astronautics recognizes only flights that exceed an altitude of 100 kilometers (62 mi). In the United States, professional, military, and commercial astronauts who travel above an altitude of 50 miles (80 km) are awarded astronaut wings.
As of June 20, 2011, a total of 523 people from 38 countries have reached 100 km (62 mi) or more in altitude, of which 520 reached low Earth orbit or beyond. Of these, 24 people have traveled beyond Low Earth orbit, to either lunar or trans-lunar orbit or to the surface of the moon; three of the 24 did so twice: Jim Lovell, John Young and Eugene Cernan. The three astronauts who have not reached low Earth orbit are Joe Walker, Mike Melvill and Brian Binnie.
The future is the indefinite time period after the present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the nature of the reality and the unavoidability of the future, everything that currently exists and will exist can be catagorized as either permanent meaning that they will exist for the whole of the future or temporary meaning that they won't and thus will come to an end. The future and the concept of eternity have been major subjects of philosophy, religion, and science and defining them non-controversially has consistently eluded the greatest of minds. It is the opposite of the past, and is the time after the present. In the Occidental view, which uses a linear conception of time, the future is the portion of the projected time line that is anticipated to occur. In special relativity the future is considered to be absolute future or the future light cone. In physics, time is considered to be the fourth dimension of the universe.
SIDO - Astronaut (feat. Andreas Bourani) OFFICIAL VIDEO
Oh Boy Prince - Astronaut ft Jspec [Official Music Video]
Simple Plan - Astronaut [New Music Video]
Sido feat. Andreas Bourani - Astronaut ► LYRICS ◄ [HQ]
Chris Hadfield demonstrates how astronauts wash their hands in zero-g
Daily Life Of An Astronaut -- FAK #31
Ohboyprince ft. Jspec - Astronaut #likeanastronaut #astronautchallenge King Imprint
Bithiri Sathi As Astronaut | Funny Conversation With Savitri Over NASA Recruitment | Teenmaar News
Karen Nyberg Shows How You Wash Hair in Space
Astronaut - Simple Plan (Lyrics)