Depends on which program you're referring to.
Mercury astronauts landed in the Atlantic Ocean.
Gemini astronauts also landed in the Atlantic ocean with the exception of Gemini 8 which, due to being aborted after less than a day in space, landed in the Western Pacific Ocean.
All Apollo crews landed in the Pacific Ocean with the exception of Apollo 7 & Apollo 9 which landed in the Atlantic near Bermuda and the Bahamas, respectively.
Russian Cosmonauts didn't land in the ocean at all--they came down on land.
Apollo 11 did land in the sea, which is the Pacific Ocean.
The Apollo 11 astronauts landed in the Sea of Tranquility.
Apollo 11 landed at the sea of tranquality.
The first astronauts landed on the Moon's surface in the area known as the Sea of Tranquility (Mare Tranquillitatis) during the Apollo 11 mission in 1969.
The correct capitalization would be "Did your astronauts land on the moon?"
The Apollo 11 astronauts landed on the Sea of Tranquility.
Apollo 11 did land in the sea, which is the Pacific Ocean.
The Apollo 11 astronauts landed in the Sea of Tranquility.
Because if they return in a capsule,it lands in the sea,or the shuttle may land in the sea.
Apollo 11 landed at the sea of tranquality.
The first astronauts landed on the Sea of Tran quality.
The first astronauts landed on the Moon's surface in the area known as the Sea of Tranquility (Mare Tranquillitatis) during the Apollo 11 mission in 1969.
The correct capitalization would be "Did your astronauts land on the moon?"
The Land of the Astronauts - 2010 is rated/received certificates of: USA:R
The American astronauts first landed on the moon, in a area called Tranquility base.
The moon.
Neil Armstrong