This is an extract from my book "Existence Downloaded -- Activated, Operated, Terminated"
SOHO (the Solar and Heliospheric Observatory) is a powerful
new spacecraft. It monitors the sun twenty-four hours a day, offering new
insights into our nearest star. Tracing the in-and-out heaving motions of the
sun’s outer-most visible surface, named the photosphere from the Greek word photos,
meaning “light”, is one method of exploring its unseen depths – says Kenneth R.
Lang (Magnificent Cosmos, 1998). This “heaving”, he explains, can reach as many
as ten kilometres high, travelling at a few hundred metres per second, and
arises from sounds that course through the solar interior. The sounds are
trapped inside the sun; they cannot propagate through the near vacuum of space
– and, even if they could reach Earth, they are too low in frequency to be
audible to humans.
Nevertheless, when these sounds strike the sun’s surface and
rebound back down, they disturb the gases there, causing them to rise and fall,
slowly and rhythmically, with a period of about five minutes. The throbbing
motions these sounds create are imperceptible to the naked eye, but SOHO
instruments routinely pick them out. (Kenneth R. Lang, in Magnificent Cosmos)
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