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The misty rain around the
Canberra Deep Space Communication Complex (CDSCC) last
month, which produced
the rainbow over DSS-43 in yesterday's ADAP,
lasted long enough to also create this rainbow across
the 26-metre diameter
DSS-46.
Rainbows are produced by an internal reflection of sunlight within raindrops,
and so always appear on the opposite side of the sky from the Sun -- and
this is why you don't see rainbows at midday when the sun is overhead.
Rainbows are most prominent in the early morning and late afternoon
when their arches are higher in the sky. The low arch below indicates the
sun was higher in the sky for this image than for yesterday's.
(Image credit: @CanberraDSN)
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