Messenger (spacecraft) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-17

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/MESSENGER


00:01:17 1 Mission overview
00:02:24 2 Mission background
00:02:34 2.1 Previous missions
00:03:11 2.2 Proposals for the mission
00:04:18 2.3 Objectives
00:05:01 3 Spacecraft design
00:06:21 3.1 Attitude control and propulsion
00:07:30 3.2 Communications
00:08:24 3.3 Power
00:08:58 3.4 Computer and software
00:10:10 3.5 Scientific instruments
00:10:22 4 Mission profile
00:10:32 4.1 Launch and trajectory
00:13:12 4.2 Earth flyby
00:14:35 4.3 Two Venus flybys
00:16:13 4.4 Three Mercury flybys
00:17:29 4.5 Orbital insertion
00:18:35 5 Primary science
00:20:17 5.1 Extended mission
00:21:51 5.2 Discovery of water, organic compounds and volcanism
00:22:38 5.3 Solar System portrait
00:23:22 6 End of mission
00:24:50 7 See also



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SUMMARY
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Messenger (stylized as MESSENGER, a backronym for "MErcury Surface, Space ENvironment, GEochemistry, and Ranging"; the name is a reference to the messenger deity Mercury from Roman mythology) was a NASA robotic spacecraft that orbited the planet Mercury between 2011 and 2015. The probe was launched aboard a Delta II rocket in August 2004 to study Mercury's chemical composition, geology, and magnetic field.
The instruments carried by MESSENGER were used on a complex series of flybys – the spacecraft flew by Earth once, Venus twice, and Mercury itself three times, allowing it to decelerate relative to Mercury using minimal fuel. During its first flyby of Mercury in January 2008, MESSENGER became the second mission after Mariner 10's 1975 flyby to reach Mercury.MESSENGER entered orbit around Mercury on March 18, 2011, becoming the first spacecraft to do so. It successfully completed its primary mission in 2012. Following two mission extensions, the MESSENGER spacecraft used the last of its maneuvering propellant and deorbited as planned, impacting the surface of Mercury on April 30, 2015.