A terminator or twilight zone is a moving line that divides the daylit side and the dark night side of a planetary body. The terminator is defined as the locus of points on a planet or moon where the
Earth's terminator as seen from space
The transition from light to dark takes place on two fronts in this image of Mimas.
A photograph of part of the terminator crossing the surface of the Earth, as seen from the ISS. The terminator is diffuse and shows the gradual transition to darkness that is experienced as twilight on the surface.
Boznańska crater near the terminator on Mercury
Apollo 13 was the seventh crewed mission in the Apollo space program and would have been the third Moon landing. The craft was launched from Kennedy Space Center on April 11, 1970, but the landing was
Terminator (solar)
…the surface. Boznańska crater near the terminator on Mercury Lunar terminator An oblique view of the large lunar crater Keeler at the terminator (from Apollo 13) The east side of Timocharis crater while at the terminator (from Apollo 15) Mosaic of Apollo 16 photos along the terminator showing Darney, Lubiniezky…
Odyssey's damaged service module, as seen from the Apollo Lunar Module Aquarius, hours before reentry
Left to right: Jim Lovell, Jack Swigert, Fred HaiseApollo program← Apollo 12Apollo 14 →
Swigert, Lovell and Haise the day before launch.
Mission Operations Control Room during the TV broadcast just before the Apollo 13 accident. Astronaut Fred Haise is shown on the screen.