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Voyager 1 and 2 - UPDATE Narrated Documentary.
학습 통계
CEFR 레벨
난이도
자막 (411 세그먼트)
In the 1960s a grand planetary tour to
study the outer planets was proposed. It
was an ambitious plan to send unmanned
probes to the outer planets of the outer
solar system. The Grand Tour could
exploit a rare unusual and favorable
alignment of the planets Jupiter Saturn
Uranus Neptune and Pluto. This planetary
alignment would occur in the late 1970s
and would not occur again for a hundred
and seventy-six years. So the twin
Voyager spacecrafts one and two were
launched in 1977 to take advantage of
this special planetary alignment. It
would allow a probe to be sent to
Jupiter and use that planet as a
gravitational slingshot to extend the
trajectory to the other planets further
out in the solar system. The primary
mission of the Voyager spacecrafts was
the exploration of Jupiter and Saturn.
After making a series of outstanding
discoveries the mission was extended.
Voyager 2 went on to explore Uranus and
Neptune and is still the only spacecraft
to have visited those outer planets.
Remote control programming was used to
endowed the voyagers with greater
capabilities than they had when they
left the earth. Eventually
Voyager 1 and Voyager 2 explored all the
giant outer planets of our solar system,
48 of their moons and the unique system
of rings and magnetic fields that those
planets possess. In December 1977 Voyager 2
entered the asteroid belt. Nine days
later
Voyager 1 traveling at a greater speed
overtook Voyager 2. In February 1998
Voyager 1 passed pioneer 10 to become
the most distant human-made object in
outer space. In 2002
Voyager 1 left the solar system rising
above the ecliptic plane at an angle of
35 degrees
and at a speed of 39,000 miles per hour.
Voyager 2 also left the solar system
diving below the ecliptic plane at an
angle of 48 degrees and a speed of 30
4,500 miles per hour . Voyager 2 still
holds the record of traveling to more
planets than any other man-made object
in history. And Voyager 1 holds the
record as the Explorer from Earth that
has traveled farthest from home. Voyager
1 and 2 completed their exploration of
the outer planets in the first dozen
years of their mission. Having completed
their primary mission in 1989 the
Voyagers were ready to begin exploring
outside the solar system. In January 1990
with voyagers new destinations outside
the solar system the project's
designation was changed to Voyager
Interstellar Mission. Both voyagers
continue exploring where nothing from
Earth has flown before. In order to
explore the solar system and beyond,
Voyager 1 and Voyager 2 were equipped
with a large number of special
scientific instruments, suites and
subsystems. Most of the instruments are
located on the body of the spacecraft.
Each spacecraft is comprised of 65,000
individual parts. Of the dozens of
working instruments that the voyagers
left earth with, there are only four
instruments still working on Voyager 1
and five instruments still working on
Voyager 2. The low energy charged
particle detector and its three sets of
particle sensors measure how many
low-energy particles hit it and
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