Transcript Uranus

URANUS
A GAS
GIANT
THE
SEVENTH
PLANET
WHAT IS URANUS?
• Uranus is the seventh planet from the Sun. It has the
third-largest planetary radius and fourth-largest planetary
mass in the Solar System. It is named after the ancient
Greek deity of the sky Uranus (Ouranos), the father of
Kronos (Saturn) and grandfather of Zeus (Jupiter).
many
wordsThough it isToo
visible
to the
naked use
eye like the five classical
planets, it was
never recognized
as a planet by ancient
keywords
only. Balance
observers because
of its dimness
slow orbit. Sir
with images.
Don’t and
cram
William Herschel announced its discovery on March 13,
too much
info into
one of the Solar
1781, expanding
the known
boundaries
System for slidethe firstmake
time inmore
modern
history. Uranus was
slides
also the firstinstead.
planet discovered with a telescope.
STRUCTURE
• Like the other gas giants, Uranus is mostly
atmosphere, with a rocky core that occupies a
small fraction of the total diameter. The
dominant atmospheric constituents are
hydrogen (83%) and helium (15%), with about
2% methane and small amounts of acetylene
and other hydrocarbons. These gases form a
deep, relatively clear region overlying a thick,
unbroken layer of white cloud made of frozen
hydrogen sulfide and ammonia particles,
overlaid by a haze of condensed methane.
MOONS
• Uranus has 27 known moons, all of which
are named after characters from the works
of William Shakespeare and Alexander
Pope.
1. Cordelia
2. Ophelia
3. Bianca
4. Cressida
5. Desdemona
6. Juliet
7. Portia
8. Rosalind
9. Mab
10. Belinda
11. Perdita
12. Puck
13. Cupid
14. Miranda
15. Francisco
16. Ariel
17. Umbriel
18. Titania
19. Oberon
20. Caliban
21. Stephano
22. Trinculo
23. Sycorax
24. Margaret
25. Prospero
26. Setebos
27. Ferdinand
CLIMATE
• At ultraviolet and visible wavelengths, Uranus's
atmosphere is remarkably bland in comparison
to the other gas giants, even to Neptune, which
it otherwise closely resembles. When Voyager 2
flew by Uranus in 1986, it observed a total of ten
cloud features across the entire planet. One
proposed explanation for this dearth of features
is that Uranus's internal heat appears markedly
lower than that of the other giant planets. The
lowest temperature recorded in Uranus's
tropopause is 49 K, making Uranus the coldest
planet in the Solar System, colder than Neptune.
INTERNAL STRUCTURE
• Uranus's mass is roughly 14.5 times that of the Earth,
making it the least massive of the giant planets. Its
diameter is slightly larger than Neptune's at roughly four
times Earth's. A resulting density of 1.27 g/cm3 makes
Uranus the second least dense planet, after Saturn. This
value indicates that it is made primarily of various ices,
Improve
yourand
outline
so the
such as water,
ammonia,
methane.
The total mass
of ice in Uranus's
not precisely
known, as
reportinterior
flows is
smoothly.
You
different figures
emerge
depending on the model
already
discussed
chosen; it must be between 9.3 and 13.5 Earth masses.
structure
in slide 3.only
Better
Hydrogen and
helium constitute
a small part of the
total, with between
0.5 andsimilar
1.5 Earth
masses. The
if
you
group
slides
remainder of the non-ice mass is accounted for by rocky
material. together.
THE SIZE
COMPARISON
BETWEEN
EARTH AND
URANUS
INTERIOR OF
URANUS
RINGS
• Like the other gas planets, Uranus has rings.
Like Jupiter's, they are very dark but like
Saturn's they are composed of fairly large
particles ranging up to 10 meters in diameter in
addition to fine dust. There are 13 known rings,
all very faint; the brightest is known as the
Epsilon ring. The Uranian rings were the first
after Saturn's to be discovered. This was of
considerable importance since we now know
that rings are a common feature of planets, not a
peculiarity of Saturn alone.
MORE ABOUT URANUS
• Uranus is the seventh planet from the Sun
and the third largest (by diameter). Uranus
is larger in diameter but smaller in mass
Please add information on
than Neptune.
behavior: orbit,km
rotational
• orbit: 2,870,990,000
from Sun
speed, axial tilt, etc. So
diameter:far,
51,118
km
(equatorial)
all you discussed is
• mass: 8.683e25
structure.kg
ABOUT WILLIAM HERSCHEL
November 15, 1738 - August 25, 1822
• FULL NAME: Frederick William
Herschel
• Born: 15-Nov-1738
Birthplace: Hannover, Hanover,
This is better in the
Germany
beginning when you
Died: 25-Aug-1822
Locationmention
of death:
Slough,
you discovered
Buckinghamshire,
England
the planet- just
don’t dwell
Cause oftoo
death:
unspecified
much on
this since it is
Remains:
St. Laurence
notBuried,
very important
for us.
Churchyard, Upton, Berkshire, England
WILLIAM HERSCHEL
------END OF PRESENTATION------
Cite your references.
Your report is too plain.
Make it more exciting with
images.