voyager program
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Voyager program
Voyager Program
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Introduction
The Voyager
program is a U.S
program that
launched twounmanned space
missions, scientific
probes Voyager 1
and Voyager 2.
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HistoryThe Voyager probes were originally conceived as part of the Mariner program, and
designated Mariner 11 and Mariner 12, respectively. They were then moved into a
separate program named Mariner Jupiter-Saturn, later retitled Voyager because it was
felt that the probes' designs had moved sufficiently far from the Mariner family that
they merited a separate name. Voyager is essentially a scaled-back version of the
Grand Tour program of the late 1960s and early 1970s. The Grand Tour's plan was to
send a pair of probes to fly by all the outer planets; it was scaled back because of
budget cuts. In the end, Voyager fulfilled all the Grand Tour flyby objectives except for
Pluto, which at the time was considered a planet by the IAU.
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AchievementsOn December 10, 2007, instruments on board Voyager 2 sent data
back to Earth indicating that the solar system is asymmetrical.
In August 2009 Voyager 1 was over 16.5 terameters (16.5×1012
meters, or 16.5×109 km, 110.7 AU, or 10.2 billion miles) from the
Sun, and thus had entered the heliosheath region between the
solar wind's termination shock and the heliopause (the limit of
the solar wind).
By December 2010 Voyager 1 had reached a region of space
where there was no net velocity of the solar wind.
On Friday, June 10, 2011, "Scientists studying the Voyager datanoticed what may be giant magnetic bubbles located in the
heliosphere, the region of our solar system that separates us from
the violent solar winds of interstellar space. The bubbles,
scientists believe, form when the sun's magnetic field becomes
warped at the edge of our solar system."
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Spacecraf t
designThe Voyager spacecraft
weighs 773 kilograms. Of this,
105 kilograms are scientific
instruments. The identical
Voyager spacecraft are three-
axis stabilized systems thatuse celestial or gyro
referenced attitude control to
maintain pointing of the high-
gain antennas toward Earth.
The prime mission science
payload consisted of 10
instruments (11 investigations
including radio science).
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Voyager interstellar mission
The Voyager primary mission was completed in 1989, with
the close flyby of Neptune by Voyager 2. The Voyager
Interstellar Mission (VIM) is a mission extension, which
began when the two spacecraft had already been in flight
for over 12 years. The Heliophysics Division of the NASA
Science Mission Directorate conducted a HeliophysicsSenior Review in 2008. The panel found that the VIM "is a
mission that is absolutely imperative to continue" and that
VIM "funding near the optimal level and increased DSN
(Deep Space Network) support is warranted."
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The Voyager Golden Records
The Voyager Golden Record Cover of the Voyager Golden Record
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The End
If you want more information
visit:
http://voyager.jpl.nasa.gov/
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