History Channel
Season. 01 Episode. 11
http://www.history.com/shows/the-universe
http://en.wikipedia.org/wiki/The_Universe_%28TV_series%29
http://www.youtube.com/watch?v=osWm8QygoH4
EXCERPTS:
Pluto:
It has the largest moon in proportion to its own size.
It also has the most inclined and eccentric orbit.
Its orbit is shape like the egg,
Pluto's orbit causes it to get significantly closer to the Sun
and then further away from the Sun.
At its closest, pluto is 2.7 billion miles from Earh.
Diameter = 1485 miles (half the width of US)
Orbit = 248 Earth years
Day length = 6.4 Earth Days.
150 lbs = 10 lbs on Pluto
We can hardly see this thing,
Even with the Hubble Space Telescope,
We get maybe four pixels across, may be 12 pixels total.
(some parts are darker some parts are brighter.)
1000 times dim light of Sun comparing to Earth.
Temp. -388 degrees F.
Scientists would love to chip away at the surface of Pluto
because hidden with its rocks
is a whole missing chapter in the history of our solar system.
Out surface of the Pluto
You don't' have an atmosphere,
You don't have glaciers,
You don't have wind,
You don't have rain,
You don't have erosion,
the only dominant feature that you see on the surface
is probably gonna be a lot of impact craters.
10th Planet, ERIS
it is 5% bigger than Pluto.
It's probably made out of the same materials
Rock in the inside, Ice on the outside.
and a little thin layer of frost on the very outside.
It has moon like Pluto.
The Kuiper belt is a 3.5 billion mile wide region
in the outer solar system near Pluto.
The result of the IAU (2006, Prague) vote stipulate that
a planet is a spherical object that orbits the Sun
and clears out the neighborhood around its orbital path.
The new definition would leave Clyde Tombaugh's
great icy discovery out in the cold.
Pluto's 76 year reign as the 9th planet was over.
Our solar system would now officially consist
of only 8 planets.
Objects like Pluto and Eris were given the new classification,
'Dwarf Planets.'
Dwarf planets posses the same characteristics as planets,
but do not have a clear orbital path.
Under the new definition, Ceres,
the largest asteroid in our solar system is also a dwarf planet.
Some Scientists Does Not Believe 'Dwarf Planets'
"The IAU vote was meant to settle the debate on what constitute a planet,
Bur many scientists refuse to accept the outcome."
The NEW HORIZONS mission
will be the first spacecraft ever to visit Pluto.
Even with its unprecedented speed
(12 miles per second, will cross Jupiter in 13 months, and 8 years after to reach Pluto)
New Horizons won't reach Pluto until July of 2015.
URANUS
1.6 BILLION MILES FROM EARTH
DIAMETER: NEARLY 32,000 MILES
ORBIT: 84 EARTH YEARS
DAY LENGTH: 17.2 HOURS
150 LBS = 133 LBS ON URANUS
AT an angle of 98 degrees,
the planet is spinning on its side.
(40 earth years one hemisphere to Sun, and other Off-side of Sun)
Uranus owes its cool bluish-green color to methane.
The methane absorbs red and orange wavelengths from sunlight
but reflect blue and green.
Uranus rings are dim and thin.
comprised of dark rocky dust.
27 Moons to Uranus.
NEPTUNE
2.68 BILLION MILES FROM EARTH
DIAMETER ROUGHLY 30,000 MILES
ORBIT: 165 EARTH YEARS.
DAY LENGTH: 16.1 EARTH HOURS.
150 LBS = 169 LBS ON NEPTUNE
"Like all the outer planets,
Neptune rotates much faster than Earh,
and this rapid spin helps to create violent winds.
"The highest winds recorded on any planet in the solar system
are on Neptune. we have winds sometimes over 100 miles per hour.
with speeds 2 to 3 times faster than in Jupiter's blustery Great Red Spot.
Neptune has complex system of moons.
13 have been discovered so far.
Some of Neptune's moon may have originally formed elsewhere in the solary system.
COOLEST OBJECT IN SOLAR SYSTEM
Neptune's largest moon, Triton
is roughly the size of Earth's Moon.
It is the coldest object in our solar system,
ever observed by astronomers,
even more frigid than Pluto
-390 degrees.
Triton, spew a mixture of liquid nitrogen, methane and ammonia.
But due to planning and transit times,
it will be at least two decades
before we approach Uranus and Neptune again.
"We've had discussions but there are no current plans."
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