| Aphelion | The Aphelion occurs when a planet is furthest to the Sun during its slightly elliptical orbit. | 
Aphelion of Earth |
| Ariel | A moon of Uranus was discovered by William Lassell on October 24, 1851. Ariel is also designated as "Uranus I". Ariel was the spirit who serves Prospero in Shakespeare's The Tempest. |
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| Belinda | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 13, 1986. Belinda is also designated as "Uranus XIV" and "S/1986 U5". Belinda is the heroine of Alexander Pope's The Rape of the Lock. |
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| Bianca | A moon of Uranus was discovered by Bradford A. Smith (Voyager 2) on January 23, 1986. Bianca is also designated as "Uranus VIII" and S/1986 U9". Bianca is the sister of Katherine (Kate) in Shakespeare's play The Taming of the Shrew. |
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| Caliban | A moon of Uranus was discovered by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars using the 200-inch Hale telescope on September 6, 1997. Caliban is also designated as "Uranus XVI" and "S/1997 U1". Caliban is the monster character from William Shakespeare's play The Tempest. |
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| Cordelia | The innermost moon of Uranus was discovered by Richard J. Terrile (Voyager 2) on January 20, 1986. Cordelia is also designated as "Uranus VI" and "S/1986 U7". Cordelia is the youngest daughter of Lear in William Shakespeare's King Lear. |
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| Cressida | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 9, 1986. Cressida is also designated as "Uranus IX" and "S/1986 U3". Cressida is the Trojan daughter of Calchas, a tragic heroine from William Shakespeare's play Troilus and Cressida. |
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| Cupid | A moon of Uranus was discovered by Mark R. Showalter and Jack J. Lissauer using the Hubble Space Telescope on August 25, 2003. Cupid is also designated as "Uranus XXVII" and "S/2003 U2". Cupid is a character in William Shakespeare's play Timon of Athens. |
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| Desdemona | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 13, 1986. Desdemona is also designated as "Uranus X" and "S/1986 U6". Desdemona is the wife of Othello in William Shakespeare's play Othello. |
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| Ferdinand | The outermost moon of Uranus was discovered by Matthew J. Holman, John J. Kavelaars, Dan Milisavljevic, and Brett J. Gladman on August 13, 2001. Ferdinand is also designated as "Uranus XX!V" and "S/2001 U2". Ferdinand is the son of the King of Naples in William Shakespeare's play The Tempest. |
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| Francisco | A moon of Uranus was discovered by Matthew J. Holman, John J. Kavelaars, Dan Milisavljevic, and Brett J. Gladman on August 13, 2001. Francisco is also designated as "Uranus XXII" and "S/2001 U3". Francisco is a lord in William Shakespeare's play The Tempest. |
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| Juliet | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 13, 1986. Juliet is also designated as "Uranus XI" and "S/1986 U2". Juliet is the heroine of William Shakespeare's play Romeo and Juliet. |
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| Mab | A moon of Uranus was discovered by Mark R. Showalter and Jack J. Lissauer using the Hubble Space Telescope on August 25, 2003. Mab is also designated as "Uranus XXVI" and "S/2003 U1". Queen Mab, a fairy queen from English folklore who is mentioned in William Shakespeare's play Romeo and Juliet. |
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| Margaret | A moon of Uranus was discovered by Matthew Holman on August 13, 2001. Margaret is also designated as "Uranus XXIII" and "S/2003 U3". Margaret is the servant of Hero in William Shakespeare's play Much Ado About Nothing. |
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| Miranda | A moon of Uranus was discovered by Gerard P. Kuiper on February 16, 1948. Miranda is also designated as "Uranus V". Miranda is Prospero's daughter in William Shakespeare's play The Tempest. |
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| Oberon | A moon of Uranus was discovered by William Herschel on January 11, 1787. Oberon is also designated as "Uranus IV". Oberon is the king of the Fairies in William Shakespeare's play A Midsummer Night's Dream. |
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| Ophelia | A moon of Uranus was discovered by Richard J. Terrile (Voyager 2) on January 20, 1986. Ophelia is also designated as "Uranus VII". Ophelia is the daughter of Polonius in William Shakespeare's play Hamlet. |
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| Opposition | For planets outside the Earth's orbit (Mars, Jupiter, Saturn, Uranus, Neptune and Pluto), the months around Oppositions are the best time to view these. An Opposition occurs when the planet is opposite from the Sun, relative to the Earth. At Opposition the planet will rise as the Sun sets and will set as the Sun rises providing an entire night of observation. Also at Opposition the planet comes physically closest to the Earth in it's orbit so it appears as large as possible. | 
Opposition |
| Perdita | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 18, 1986. Perdita is also designated as "Uranus XXV" and "S/1986 U10.". Perdita is the daughter of Leontes and Hermione in William Shakespeare's play The Winter's Tale. |
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| Perihelion | The Perihelion occurs when a planet is closest to the Sun during its slightly elliptical orbit. | 
Perihelion of Earth |
| Portia | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 3, 1986. Portia is also designated as "Uranus XII" and "S/1986 U1". Portia is the heroine of William Shakespeare's play The Merchant of Venice. |
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| Prospero | A moon of Uranus was discovered by Matthew J. Holman, John J. Kavelaars, Brett J. Gladman, Jean-Marc Petit, and Hans Scholl on July 18, 1999. Prospero is also designated as "Uranus XVIII" and "S/1999 U3". Prospero is the sorcerer in William Shakespeare's play The Tempest. |
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| Puck | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on December 30, 1985. Puck is also designated as "Uranus XV" and "S/1985 U1". Puck is a mischievous sprite who appears in Shakespeare's play A Midsummer Night's Dream. |
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| Rosalind | A moon of Uranus was discovered by Stephen P. Synnott (Voyager 2) on January 13, 1986. Rosalind is also designated as "Uranus XIII" and "S/1986 U4". Rosalind is the daughter of the banished Duke in William Shakespeare's play As You Like It. |
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| Setebos | A moon of Uranus was discovered by Discovered by John J. Kavelaars, Brett J. Gladman, Matthew J. Holman, Jean-Marc Petit and Hans Scholl on July 18, 1999. Setebos is also designated as "Uranus XIX" and "S/1999 U1". Setebos is the god worshipped by Caliban and Sycorax in William Shakespeare's play The Tempest. |
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| Stephano | A moon of Uranus was discovered by John J. Kavelaars, Brett J. Gladman, Matthew J. Holman, Jean-Marc Petit and Hans Scholl on July 18, 1999. Stephano is also designated as "Uranus XX" and "S/1999 U2". Stephano is the drunken butler in William Shakespeare's play The Tempest. |
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| Sycorax | A moon of Uranus was discovered by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars using the 200-inch Hale telescope on September 6, 1997. Sycorax is also designated as "Uranus XVII" and "S/1997 U2". Sycorax is the mother of the monster character, Caliban, from William Shakespeare's play The Tempest. |
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| Titania | The largest moon of Uranus was discovered by William Herschel on January 11, 1787. Titania is also designated as "Uranus III". Titania is the Queen of the Faeries in William Shakespeare's play A Midsummer Night's Dream. |
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| Trinculo | A moon of Uranus was discovered by Discovered by Matthew J. Holman, John J. Kavelaars, Dan Milisavljevic on August 13, 2001. Trinculo is also designated as "Uranus XXI" and "S/2001 U1". Trinculo is the drunken butler in William Shakespeare's play The Tempest. |
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| Umbriel | A moon of Uranus was discovered by William Lassell on October 24, 1851. Umbriel is also designated as "Uranus II". Umbriel is the 'dusky melancholy sprite' in Alexander Pope's poem The Rape of the Lock. |
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| Uranian | Having to do with the planet Uranus. |
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| Uranus | Uranus is the seventh planet from the Sun. Uranus' diameter is 51,100 km and takes 84 years to orbit the Sun. Uranus is named after the Greek god of sky. Uranus was discovered on March 13th,1781 by Sir William Herschel, who reported it as a comet on April 26, 1781. |
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