Unmanned spaceflight | Wikipedia audio article
Channel: Subhajit Sahu
Date: 2019-03-29

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Spaceflight


00:01:35 1 History
00:05:01 2 Phases
00:05:10 2.1 Launch
00:06:43 2.2 Reaching space
00:07:42 2.2.1 Alternatives
00:08:30 2.3 Leaving orbit
00:11:53 2.4 Astrodynamics
00:12:38 2.5 Transfer energy
00:13:09 2.6 Reentry
00:13:56 2.7 Landing
00:14:29 2.8 Recovery
00:15:03 3 Types
00:15:12 3.1 Uncrewed
00:16:29 3.1.1 Benefits
00:17:32 3.1.2 Telepresence
00:18:23 3.2 Human
00:19:14 3.3 Sub-orbital
00:21:15 3.4 Point-to-point
00:22:30 3.5 Orbital
00:23:07 3.6 Interplanetary
00:23:30 3.7 Interstellar
00:24:54 3.8 Intergalactic
00:25:17 4 Spacecraft
00:25:48 4.1 Propulsion
00:26:14 4.2 Launch systems
00:26:30 4.2.1 Expendable
00:26:46 4.2.2 Reusable
00:29:40 5 Challenges
00:29:49 5.1 Space disasters
00:30:54 5.2 Weightlessness
00:31:40 5.3 Radiation
00:32:13 5.4 Life support
00:33:14 5.5 Space weather
00:34:43 5.6 Environmental considerations
00:35:53 6 Applications



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Speaking Rate: 0.8042171608583842
Voice name: en-GB-Wavenet-B


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SUMMARY
=======
Spaceflight (also written space flight) is ballistic flight into or through outer space. Spaceflight can occur with spacecraft with or without humans on board. Examples of human spaceflight include the U.S. Apollo Moon landing and Space Shuttle programs and the Russian Soyuz program, as well as the ongoing International Space Station. Examples of unmanned spaceflight include space probes that leave Earth orbit, as well as satellites in orbit around Earth, such as communications satellites. These operate either by telerobotic control or are fully autonomous.
Spaceflight is used in space exploration, and also in commercial activities like space tourism and satellite telecommunications. Additional non-commercial uses of spaceflight include space observatories, reconnaissance satellites and other Earth observation satellites.
A spaceflight typically begins with a rocket launch, which provides the initial thrust to overcome the force of gravity and propels the spacecraft from the surface of the Earth. Once in space, the motion of a spacecraft – both when unpropelled and when under propulsion – is covered by the area of study called astrodynamics. Some spacecraft remain in space indefinitely, some disintegrate during atmospheric reentry, and others reach a planetary or lunar surface for landing or impact.