Transcript Welcome to Neptune

Welcome to Neptune
By Nhat Anh
Content
What is Neptune
What is Neptune made of
Discovery
Internal staked
Storm
Exporation
What is Neptune ?
Neptune is the eighth and farthest planet
from the sun in our solar system. Name for the
Roman god of the sea, it is fourth-largest
planet by diameter and the third-largest by
mass. Neptune is 17 time the mass of Earth
and Is slightly more massive than its neartwin
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What Neptune made of
Like the rest of
the giant gas
planet in The
solar system,
they all can be
broken up into
various layer.
The composition
of Neptune
changes depend
on which of these
layer you’re
looking at.
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Discovery
Galileo drawings show that he first observed
Neptune on December 28, 1612, and again on
January 27, 1613. On both occasions, Galileo
mistook Neptune for a fixed star when it
appeared very close in conjunction to Jupiter in
the night sky hence, he is not credited with
Neptune's discovery. During the period of his
first observation in December 1612, Neptune was
stationary in the sky because it had just turned
retrograde that very day. This apparent
backward motion is created when the orbit of
the Earth takes it past an outer planet
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Internal structure
Internal structure
Neptune's internal structure resembles that of
Uranus. Its atmosphere forms about 5 to 10
percent of its mass and extends perhaps 10 to 20
percent of the way towards the core, where it
reaches pressures of about 10 GPA. Increasing
concentrations of methane, ammonia and water
are found in the lower regions of the
atmosphere.
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Strom
• In 1989, the Great Dark Spot, an anti-cyclonic
storm system spanning 13000×6600 km, was
discovered by NASA's Voyager 2 spacecraft. The
storm resembled the Great Red Spot of Jupiter.
Some five years later, however, on November 2,
1994, the Hubble Space Telescope did not see the
Great Dark Spot on the planet. Instead, a new
storm similar to the Great Dark Spot was found
in the planet's northern hemisphere.
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Exploration
• Voyager 's closest approach to Neptune occurred
on August 25, 1989. Since this was the last major
planet the spacecraft could visit, it was decided
to make a close flyby of the moon Triton,
regardless of the consequences to the trajectory,
similarly to what was done for Voyager 1's
encounter with Saturn and its moon Titan. The
images relayed back to Earth from Voyager 2
became the basis of a 1989 PBS all-night
program, Neptune all night .
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Thank you for
looking At
Nhat anh PPT