Which one of the following pairs is not correctly matched?

Option 4 is not correctly matched. Atlantis is not a space station but a Space Shuttle orbiter (it is repeatedly referred to as “Space Shuttle Atlantis” in NASA materials) [2]. The other pairs are correctly matched: the Cosmic Background Explorer (COBE) was a NASA satellite mission designed to map the cosmic microwave background [1], and FALCON (Falcon) refers to a submarine/undersea fiber-optic cable system linking countries across the India–Middle East–Africa region. The Space Shuttle Discovery is also a NASA orbiter (i.e., a space shuttle), so its pairing is correct. Therefore the incorrect pair is Atlantis: Space station (option 4).

Sources

1. [2] https://www.nasa.gov/wp-content/uploads/2023/04/1986-1990.pdf?emrc=8b8b8b
2. [1] https://svs.gsfc.nasa.gov/14715/