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Astronomy Picture of the Day
Triton: Neptune's Largest Moon
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#99075
by
[z]Barbara Harris
@
05.03.2007 00:00
- nach oben -
Triton: Neptune's Largest Moon
Explanation:
In October of 1846,
William Lassell
was observing the newly discovered planet
Neptune
.
He was attempting to confirm his observation, made just the previous week,
that
Neptune
had a ring.
But this time he discovered that Neptune had a satellite as well.
Lassell soon proved that the ring was a product of his new
telescope's distortion, but the satellite
Triton
remained.
The
above picture
of
Triton
was taken in 1989 by the only spacecraft ever to pass
Triton
:
Voyager
2.
Voyager 2 found
fascinating terrain
,
a thin atmosphere, and even evidence for
ice volcanoes
on this world of peculiar orbit and spin.
Ironically, Voyager 2 also confirmed the existence of
>complete thin rings around Neptune
- but these would have been quite
invisible
to Lassell!
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