Yes, "Jupiter" should be capitalized in a sentence as it is a proper noun referring to the planet in our solar system.

Philip Nash has written:

'Automatic sprinkler systems for fire protection'

'The other missiles of October' -- subject(s): Politics and government, Foreign relations, Jupiter missile, Government policy, Cuban Missile Crisis, 1962, Military policy

missile

the names of jupiter are as follows:

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

jupiter

and last but not least JuPiTeR

An air-to-surface missile is a missile which is fired from an aircraft to the ground.