the longest channel in the solar system:
the longest channel in the solar system
This is a 200
kilometer (124 mile) segment of a sinuous channel on
Venus. The channel
is approximately 2 kilometers (1.2 miles) wide
the amazing half-crater:
the amazing half-crater
The half-crater
was formed by the impact of a large asteroid. The eastern half of the crater
has been completely destroyed during the formation of a fault-valley that
is up to 20 kilometers (12 miles) wide and
apparently quite
deep.
arachnoids:
arachnoids
Spider-like craters found only on Venus.