The Cosmonauts Sea (Russian: Море Космонавтов, More Kosmonavtov; sometimes misspelled Cosmonaut Sea) was a proposed sea name as part of the Southern Ocean, off the Prince Olav Coast and Enderby Land, Antarctica, between about 30°E and 50°E.
The Cosmonauts Sea, which was named in 1962 by the Soviet Antarctic Expedition in honor of the world's first cosmonauts and the beginning of the crewed space exploration era, The name first appeared as a Russian proposal to the IHO in the IHO 2002 draft.
[2] Leading geographic authorities and atlases do not use the name, including the 2014 10th edition of the World Atlas from the United States' National Geographic Society and the 2014 12th edition of the British Times Atlas of the World, though state-issued maps created by the Soviet Union and the Russian Federation do.
[3] The water here is close to freezing throughout the year and is mostly covered by ice.
[4] Between 1973 and 1986, several polynyas have occurred in these waters, with the totally enclosed Cosmonaut polynya attaining its maximum size on July 25, 1980, with an open water area of as much as 137,700 km2.