Jupiter (Planet) -- Photographs from space; Jupiter probes; Voyager Project
Tim Mutch had a different perspective. “Although we have just heard
Jupiter somewhat downgraded in favor of Saturn, nonetheless what we have
been witnessing, first in March and now, in July, is a truly
revolutionary journey of exploration. We have gone beyond the familiar
part of the solar system to objects that are so exotic that their very
existence, at least as far as I’m concerned, was something I’d accepted
intellectually, but didn’t really accept in an immediate sense. We’re
starting out in our own space program on a new stage of space
exploration—on our own long journeys beyond the solar system to distant
lands. We never like to think, or rather, it’s statistically unlikely,
that we’re at a turning point in history. But if you look back at
history books, such events are clearly read into the record. And I
submit to you that when the history books are written a hundred years
from now, two hundred years from now, the historians are going to cite
this particular period of exploration as a turning point in our
cultural, our scientific, our intellectual development.”
Although everyone was already celebrating another successful mission,
the encounter was far from over. Data continued to come in; there was
still the ten-hour Io Volcano Watch, which had begun at 4:31 p.m.; there
were more observations of Jupiter, including scheduled ring observations
and dark side searches for aurorae and lightning bolts. There was a lot
of work and excitement yet to come. Jupiter had another surprise in
store for Voyager 2.
[Illustration: During the 10-hour Io volcano watch on July 9, the
spacecraft kept nearly the same face of Io in view. Most of the
surface was turned away from the Sun, however, and only a thin
crescent could be seen, shrinking as the observations continued.
These four frames were all photographed with identical exposures
from a range of about 1 million kilometers. These images show
Amirani (P₅) and Maui (P₆) on the west edge, brightening as the Sun
illuminates them more nearly from behind. [260-677]]
[Illustration: Io volcanoes.]
[Illustration: Masubi (P₈) is faintly visible in the crescent (above
and below).]
[Illustration: Io volcanoes.]
[Illustration: Loki (P₂) rises 250 kilometers above the surface,
catching the morning sunlight on the east edge of Io.]
Tuesday, July 10.
(_Range to Jupiter, 1.4 million kilometers_). The Io watch continued
through the night. As time passed, the satellite rotated in the same
direction as the motion of the spacecraft, keeping nearly the same side
in view. Because of this, a few volcanoes could be closely watched, but
most would be missed entirely. During the sequence, the illuminated
crescent steadily shrank, until at the end, volcanic plumes could be
seen on both edges, one illuminated by the setting Sun, the other
shining in the dawn light.
Public-domain text, read in full here on John Shaqi.
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