Suborbital | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-03

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Sub-orbital_spaceflight


00:01:08 1 Altitude requirement
00:01:53 2 Orbit
00:02:49 3 Speed, range, and altitude
00:09:45 4 Flight duration
00:11:43 5 Flight profiles
00:16:52 5.1 Ballistic missiles
00:17:18 5.2 Tourist flights
00:17:35 5.3 Scientific experiments
00:18:21 5.4 Sub-orbital transportation
00:20:46 6 Notable unmanned sub-orbital spaceflights
00:21:32 7 Manned sub-orbital spaceflights
00:22:47 8 Future of manned sub-orbital spaceflight
00:23:40 9 See also
00:23:54 10 References
00:24:36 See also



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services/invoke/uid/0000001a130b3f91
Other Wikipedia audio articles at:
https://www.youtube.com/results?search_query=wikipedia+tts
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.8639356396781845
Voice name: en-AU-Wavenet-D


"I cannot teach anybody anything, I can only make them think."
- Socrates


SUMMARY
=======
A sub-orbital spaceflight is a spaceflight in which the spacecraft reaches outer space, but its trajectory intersects the atmosphere or surface of the gravitating body from which it was launched, so that it will not complete one orbital revolution.
For example, the path of an object launched from Earth that reaches the Kármán line (at 100 km (62 mi) above sea level), and then falls back to Earth, is considered a sub-orbital spaceflight. Some sub-orbital flights have been undertaken to test spacecraft and launch vehicles later intended for orbital spaceflight. Other vehicles are specifically designed only for sub-orbital flight; examples include manned vehicles, such as the X-15 and SpaceShipOne, and unmanned ones, such as ICBMs and sounding rockets.
Flights which attain sufficient velocity to go into low Earth orbit, and then de-orbit before completing their first full orbit, are not considered sub-orbital. Examples of this include Yuri Gagarin's Vostok 1, and flights of the Fractional Orbital Bombardment System.
Usually a rocket is used, but experimental sub-orbital spaceflight has also been achieved with a space gun.