Similar to XEUS

Clover (telescope)

CNEOS 2014-01-08

CNO cycle

9997 COBE

COCONUTS-2b

Cool Companions on Ultrawide Orbits

CoRoT-1

CoRoT-1b

CoRoT-2

List of canceled launch vehicle designs

Airborne Launch Assist Space Access

Project VR-190

McDonnell Douglas DC-X

GX (rocket)

British Aerospace HOTOL

Jupiter Icy Moons Orbiter

Kistler K-1

Lunar-A

MAKS (spacecraft)

Megaroc

Man in Space Soonest

Nova (NASA rocket)

OTRAG