Bow shocks in astrophysics | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-03

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Bow_shocks_in_astrophysics


00:00:58 1 Description
00:03:09 2 Around the Earth
00:03:56 3 At comets
00:06:13 4 Around the Sun
00:07:54 5 Around other stars
00:08:45 6 Around massive stars
00:10:16 7 Magnetic draping effect
00:14:26 8 See also



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SUMMARY
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Bow shocks form the boundary between a magnetosphere and an ambient (or at least surrounding) magnetized medium. This occurs when the magnetic field of an astrophysical object interacts with the nearby flowing ambient plasma. For example, when the solar wind, flowing with a relative speed of order 400 km/s, encounters the magnetic field of Earth, a bow shape boundary forms. For Earth and other magnetized planets, it is the boundary at which the speed of the stellar wind abruptly drops as a result of its approach to the magnetopause. For stars, this boundary is typically the edge of the astrosphere, where the stellar wind meets the interstellar medium.