Sagan Pyramids
Referenced in 1 episode
Definition
Pyramid-shaped formations in the Elysium region of Mars imaged by Mariner 9 in 1972. They were first described by Mac Gibson in the journal Icarus in 1974 and later popularized by Carl Sagan.
Referenced in 1 episode
Pyramid-shaped formations in the Elysium region of Mars imaged by Mariner 9 in 1972. They were first described by Mac Gibson in the journal Icarus in 1974 and later popularized by Carl Sagan.