Uranus has 27 known moons that can be divided into three groups: 13 inner moons that are closely connected to Uranus's rings, 5 major moons that are spherical in shape, and 9 irregular moons in distant elliptical orbits. The 5 major moons - Miranda, Ariel, Umbriel, Titania, and Oberon - range in size from 472 km to 1578 km in diameter and are believed to have formed from an accretion disk around Uranus after its formation. Titania is the largest moon.

1. By: JoanaChantengco

2. Uranus is the seventh planet from the sun

3. - 3rd largest planetary radius
-4rth Largest planetary
mass
-similar composition to
Neptune “ice giant’’

4. Uranus atmosphere
-hydrogen
-helium
-contain more “ices” such as water
ammonia and methane along with traces
of other hydrocarbons.
-interior of Uranus is main composed of
ices and rocks

6. Uranus, the seventh planet of the Solar System, has 27
known moons.
named after characters from the works of:
- William Shakespeare
-Alexander Pope

7. Uranian moons are divided into three groups:
-Thirteen inner moons,
-five major moons
-nine irregular moons.

8. the inner moons are small dark bodies that share common
properties and origins with the planet's rings.
The five major moons are massive enough to have achieved
hydrostatic equilibrium, and four of them show signs of
internally driven processes such as canyon formation and
volcanism on their surfaces.
The irregular moons have elliptical and strongly inclined
(mostly retrograde) orbits at great distances from the planet.

9. William Herschel discovered the first two
moons, Titania and Oberon, in 1787,
the other three ellipsoidal moons were discovered in 1851
by William Lassell (Ariel and Umbriel)
in 1948 by Gerard Kuiper (Miranda).
These five have planetary mass, and so would be
considered (dwarf) planets if they were in direct
orbit about the Sun.

10. The largest of these five, Titania, is 1,578 km in
diameter and the eighth-largest moon in the Solar
System, and about one-twentieth the mass of the Moon.

11. The remaining moons were discovered after 1985,
either during the Voyager 2 flyby mission or with
the aid of advanced Earth-based telescopes.

12. The first two moons to be discovered
were Titania and Oberon which were spotted by
Sir William Herschel on January 11, 1787, 6years after he
had discovered the planet itself.
the next two moons, Ariel and Umbriel, were discovered
by William Lassell in 1851

13. The Roman numbering scheme of Uranus's moons was in
a state of flux for a considerable time, and publications
hesitated between Herschel's designations
(where Titania and Oberon are Uranus II and IV)
William Lassell's (where they are sometimes I and II).
In 1852, Herschel's son John Herschel gave the four
then-known moons their names.

14. Gerard Kuiper at
the McDonald
Observatory
discovered the
smallest and the
last of the five
large, spherical
moons, Miranda.

15. the flyby of the Voyager 2 space probe in January 1986
led to the discovery of ten further inner moons.
Perdita, was retroactively discovered in 1999 after
studying old Voyager photographs.
Uranus was the last giant planet without any
known irregular moons, but since 1997 nine distant
irregular moons have been identified using ground-
based telescopes.

16. Two more small inner moons, Cupid and Mab, were
discovered using the Hubble Space Telescope in 2003.
The moon Margaret was the last Uranian moon
discovered as of 2012, and its details were published in
October 2003.

17. After Herschel discovered Titania and Oberon on January
11, 1787, he subsequently believed that he had observed
four other moons:
2 on January 18 and February 9, 1790,
and 2 more on February 28 and March 26, 1794.
It was thus believed for many decades thereafter that
Uranus had a system of six satellites, though the four latter
moons were never confirmed by any other astronomer.
Spurious moons

18. Lassell's observations of 1851, in which he
discovered Ariel and Umbriel, however, failed to support
Herschel's observations; Ariel and Umbriel, which
Herschel certainly ought to have seen if he had seen any
satellites beside Titania and Oberon, did not correspond to
any of Herschel's four additional satellites in orbital
characteristics.

19. Herschel's four spurious satellites were thought to
have sidereal periods of :
5.89 days (interior to Titania),
10.96 days (between Titania and Oberon),
38.08 days, and 107.69 days (exterior to Oberon).
and the credit for the discovery of Ariel and Umbriel
was given to Lassell.

20. Naming of moons
The first two Uranian moons, discovered in 1787, did not
receive names until 1852, a year after two more moons had
been discovered. The responsibility for naming was taken
by John Herschel, (son of the discoverer of Uranus)
Herschel, instead of assigning names from Greek mythology,
named the moons after magical spirits in English literature:
the fairies Oberon and Titania from William Shakespeare's
A Midsummer Night's Dream,

21. and the sylphs Ariel and Umbriel from Alexander Pope's The
Rape of the Lock (Ariel is also a sprite in Shakespeare's The
Tempest)
The reasoning was presumably that Uranus, as god of the
sky and air, would be attended by spirits of the air.
the fifth moon, Miranda, was named by its discoverer Gerard
Kuiper after a thoroughly mortal character in Shakespeare's The
Tempest.

22. At first, the outermost moons were all named after
characters from one play, The Tempest; but
with Margaret being named from Much Ado About
Nothing that trend has ended.

23. The Rape of the Lock (a poem by Alexander Pope):
Ariel, Umbriel, Belinda
Plays by William Shakespeare:
A Midsummer Night's Dream: Titania, Oberon, Puck
The Tempest: (Ariel), Miranda, Caliban, Sycorax, Prospero,
Setebos, Stephano, Trinculo, Francisco, Ferdinand
King Lear: Cordelia
Hamlet: Ophelia
The Taming of the Shrew: Bianca

24. Troilus and Cressida: Cressida
Othello: Desdemona
Romeo and Juliet: Juliet, Mab
The Merchant of Venice: Portia
As You Like It: Rosalind
Much Ado About Nothing: Margaret
The Winter's Tale: Perdita
Timon of Athens: Cupid

25. Inner moon and Rings of Uranus
As of 2008, Uranus is known to possess 13 inner moons.
Their orbits lie inside that of Miranda. All inner moons
are intimately connected to the rings of Uranus, which
probably resulted from the fragmentation of one or
several small inner moons.

26. The two innermost moons (Cordelia and Ophelia) serve
as shepherds of Uranus's ε ring, whereas the small
moon Mab is a source of Uranus's outermost μ ring.
Puck, at 162 km, is the largest of the inner moons of Uranus and
the only one imaged by Voyager 2
Puck and Mab are the 2 outermost inner satellites of Uranus.

27. All inner moons are dark objects;
-their geometrical albedo does not exceed 10%
-They are made of water ice contaminated with a dark material
The small inner moons constantly perturb each other. The
system is chaotic and apparently unstable. Simulations show
that the moons may perturb each other into crossing orbits,
which may eventually result in collisions between the moons.
Desdemona may collide with either Cressida or Juliet within
the next 100 million years.

28. Large moons
Uranus has five major moons: Miranda, Ariel, Umbriel,Titania,
and Oberon.
They range in diameter from 472 km for Miranda to 1578 km
for Titania.
Umbriel is the darkest moon,
Ariel is the brightest.
6.7 × 1019 kg (Miranda) to 3.5 × 1021 kg (Titania)—for
comparison, the Moon has mass of 7.5 × 1022 kg.

29. The major moons of Uranus are believed to have formed in
the accretion disc, which existed around Uranus for some time
after its formation or resulted from the large impact suffered
by Uranus early in its history.
All major moons comprise approximately equal amounts rock
and ice, except Miranda :
which is made primarily of ice. (ammonia and carbon dioxide.)
Ariel appears to have the youngest surface with the fewest
impact craters, while Umbriel's appears oldest.

30. the major moons of Uranus are airless bodies. For
instance, Titania was shown to possess no atmosphere at
a pressure larger than 10–20 nanobar

31. The major moons have almost exactly the same rotational
axial tilt as Uranus's (their axes are parallel to that of
Uranus) The Sun would appear to follow a circular path
around Uranus's celestial pole in the sky, at the closest
about 7 degrees from it.

32. The five largest moons of Uranus compared at their proper
relative sizes and brightnesses. From left to right (in order of
increasing distance from Uranus): Miranda, Ariel, Umbriel,
Titania, and Oberon

33. Irregular moons
As of 2005 Uranus is known to have nine irregular moons, which
orbit it at a distance much greater than that of Oberon, the
furthest of the large moons.
All the irregular moons are probably captured objects that
were trapped by Uranus soon after its formation.

34. The diagram illustrates the orbits of those irregular
moons discovered so far. The moons above the X axis
are prograde, those beneath are retrograde. The radius of
the Uranus's Hill sphere is approximately 73 million km.
Uranus's irregular moons range in size from about 150 km
(Sycorax) to 18 km (Trinculo).[2] Unlike Jupiter's irregulars,
Uranus's show no correlation axis versus inclination.

35. Margaret is the only known irregular
prograde moon of Uranus

36. 1-13 inner moons
14-18 inner moons
19-23 and 25-27 irregular moons (retrograde)
24 irregular moons (prograde)

37. Order label Name Distance
(000km)
Radius
(km)
Mass
(kg)
Date Discover
er
1. VI Cordelia 50 13 ? 1986 Voyager 2
2. VII
Ophelia 54
16 ? 1986 Voyager 2
3. VIII Bianca 59 22 ? 1986 Voyager 2
4. IX Cressida 62 33 ? 1986 Voyager 2
5. X Desdemona 63 29 ? 1986 Voyager 2
6. XI Juliet 64 42 ? 1986 Voyager 2
7. XII Portia 66 55 ? 1986 Voyager 2
8. XIII Rosalind 70 27 ? 1986 Voyager 2
9. XXVI Cupid 75 6 ? 2003 Showalter

38. Order Label Name Distance
(000km)
Radius
(km)
Mass
(kg)
Date Discover
er
10. XIV Belinda 75 34 ? 1986 Voyager 2
11. XXV Perdita
76
40 ? 1986 Voyager 2
12. XV Puck 86 77 ? 1985 Voyager 2
13. XXVI Mab 98 8 ? 2003 Showalter
14. V Miranda 130 266 6.30e19 1948 Kuiper
15. I Ariel 191 579 1.27e21 1851 Lassell
16. II Umbriel 266 585 1.27e21 1851 Lassell
17. III Titania 436 789 3.49e21 1787 Herschel
18. IV Oberon 583 761 3.03e21 1787 herschel

39. Order Label Name Distance
(000km)
Radius
(km)
Mass
(kg)
Date Discover
er
19. XXII Francisco 4281 6 ? 2003 Sheppard
20. XVI Caliban
7169
40 ? 1997 Gladman
21. XX Stephano 7948 15 ? 1999 Gladman
22. XXI Trinculo 8578 5 ? 2001 Holman
23. XVII Sycorax 12213 80 ? 1997 Nicholson
24. XXIII Margaret 14689 6 ? 2003 Sheppard
25. XXIII Prospero 16568 20 ? 1999 Holman
26. XIX Setebos 17681 20 ? 1999 Kavelaars
27. XXIV Ferdinand 21000 6 ? 2003 Sheppard