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Spaceflight
Spaceflight
(also written
space flight
) is
ballistic
flight
into or through
outer space
. Spaceflight can occur with
spacecraft
with or without humans on board. Examples of
human spaceflight
include the
U.S.
Apollo Moon landing
and
Space Shuttle programs
and the
Russian
Soyuz program
, as well as the ongoing
International Space Station
. Examples of unmanned spaceflight include
space probes
that leave
Earth orbit
, as well as
satellites
in
orbit
around
Earth
, such as
communications satellites
. These operate either by
telerobotic
control or are fully
autonomous
.
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