Exploratory missions to other planets within the local
system. Ever since the
moon landings, people have dreamed of sending
manned missions to other planets, most noteably
Mars. However, due to the extreme cost of getting people onto other planets and somehow persuading them to stay
alive at the same time, all interplanetary expeditions have been made by
robotic probes. Such probes like
Mariner 10,
Voyager 1, and
Voyager 2 have all traveled to other planets but simply passed by, making a grand sweep of the
solar system to gather data on multiple
celestial bodies. With this data,
scientists have been able to plan more
specialized expeditions to individual planets. The
Viking landers, the
Mars Observer, which was lost, the
Mars Global Surveyor, and the
Sojourner missions all were focused on, duh,
Mars. The
Galileo probe arrived at
Jupiter in
December of
1995, and has produced a
plethora of data on Jupiter and its moons, including
Io, the most
volcanically active body in the solar system, and
Europa, which many scientists believe has an ocean of liquid
water below its icy
surface, and, quite possibly,
extraterrestrial life. Galileo is currently studying the effects of
solar wind on Jupiter's
magnetic field in conjunction with the
Cassini spacecraft.
Future missions planned include: