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Exploration of Mars
The exploration of Mars has
been an important part of
the space exploration
missions of the Soviet Union
(later Russia), the United
States, Europe, and Japan.
Dozens of unmanned
spacecraft, including
... > full story
Voyager program
The Voyager program
consisted of a pair of
unmanned scientific probes,
Voyager 1 and Voyager 2,
launched in 1977. They were
sent to study Jupiter and
Saturn, using an
advantageous planetary
... > full story
Lunar space elevator
A lunar space elevator (also
called a moonstalk) is a
proposed cable running from
the surface of the Moon into
space. It is similar in
concept to the better known
Earth space elevator idea (a
cable suspended above Earth,
... > full story
Multistage rocket
A multistage (or
multi-stage) rocket is, like
any rocket, propelled by the
recoil pressure of the
burning gases it emits as it
burns fuel. What
characterizes it as
"multi-stage" is that it
... > full story
Browse Reference Articles
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Phoenix (spacecraft)
The Phoenix is a planned multi-agency Mars lander, headed by the University of Arizona's Lunar and Planetary Laboratory, under the direction of NASA, scheduled to launch on August 3, 2007. It is a ... > more -
Spacecraft propulsion
Spacecraft propulsion is used to change the velocity of spacecraft and artificial satellites, or in short, to provide delta-v. There are many different methods. Each method has drawbacks and ... > more -
Space Shuttle Columbia
Space Shuttle Columbia (NASA Orbiter Vehicle Designation: OV-102) was the first space shuttle in NASA's orbital fleet. Its first mission, STS-1, lasted from April 12 to April 14, 1981. On February 1, ... > more -
Hybrid rocket
A hybrid rocket propulsion system comprises propellants of two different states of matter, the most common configuration being a rocket engine composed of a solid propellant lining a combustion ... > more -
Solid-fuel rocket
A solid rocket or a solid fuel rocket is a rocket with a motor that uses solid propellants (fuel/oxidizer). The earliest rockets were solid fuelled, powered by gunpowder, used by the Chinese in ... > more -
Ion thruster
An ion thruster (or ion drive), one of several types of spacecraft propulsion, uses beams of ions - electrically charged atoms or molecules - for propulsion. The precise method for accelerating the ... > more -
European Space Agency
The European Space Agency (ESA), established in 1975, is an inter-governmental organisation dedicated to exploration of space with currently 17 member states. ESA has ambitious space plans that may ... > more
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