Sedna Planitia is a large lowland area of
Venus
Venus is the second planet from the Sun. It is often called Earth's "twin" or "sister" planet for having almost the same size and mass, and the closest orbit to Earth's. While both are rocky planets, Venus has an atmosphere much thicker ...
, south of
Ishtar Terra.
It is thought to be lava-covered and similar to a
lunar mare. Its name is derived from the
Inuit sea goddess.
References
Surface features of Venus
Extraterrestrial plains
Volcanism on Venus
{{Venus-stub