Louis Niesten
Louis Niesten
(
1844
–
1920
) was a
Belgian
astronomer
working at the
Brussels Royal Observatory
. In
1877
he observed
Mars
and created a detailed map of its surface features. He organized an expedition to
Santiago de Chile
to observe the
Venus
transit
over the
Sun
in
1882
. A second Belgian expedition (led by
Jean-Charles Houzeau
) travelled to
San Antonio, Texas
to determine the planet's
parallax
during the same transit. Both parties used a specially designed
heliometer
for this purpose. A
crater
on Mars was named in his honor.
External links
Description of 1882 Venus expeditions
Niesten, Louis Niesten, Louis Niesten, Louis
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