ⓘ Free online encyclopedia. Did you know? page 15




                                               

Kiviuq (moon)

Kiviuq is a non-spherical moon of Saturn. It was found by Brett J. Gladman in 2000, and given the designation S/2000 S 5. It was named in 2003 after a "giant" of Inuit mythology. Kiviuq also spelled Keeveeok, Qiviuq or Kivioq is a legendary and h ...

                                               

Kraken Mare

Kraken Mare is the largest known lake on the surface of Saturns moon Titan. It was discovered in 2007 by the Cassini probe and was named in 2008 after the Kraken, a legendary sea monster. Kraken Mare is believed to be the largest of seas and lake ...

                                               

Lakes of Titan

The lakes of Titan, a moon of Saturn, are made of liquid methane. The lakes were found by the Cassini-Huygens space probe. The larger lakes are known as maria and the smaller ones as lacūs. It was possible that there were seas of liquid methane o ...

                                               

Mayda Insula

Mayda Insula is an island in the Kraken Mare. It is a body of liquid composed mostly of methane, on Saturns largest moon Titan. Mayda Insula is the first island to be named on a planet or moon other than Earth.

                                               

Mimas (moon)

Mimas is one of Saturns largest moons. It is also called Saturn I. Mimas is best known for its large crater, Herschel. In the centre of the crater is a very high mountain. Mimas was discovered by the English astronomer William Herschel on Septemb ...

                                               

Mundilfari (moon)

Mundilfari or Saturn XXV, is a moon of Saturn. It was found by Brett J. Gladman, et al. in 2000, and given the designation S/2000 S 9. Mundilfari is about 5.6 kilometres in diameter, and orbits Saturn at an average distance of 18.360.000 km in 92 ...

                                               

Paaliaq (moon)

Paaliaq is a non-spherical moon of Saturn. It was found by Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, Hans Scholl, Matthew J. Holman, Brian G. Marsden, Philip D. Nicholson and Joseph A. Burns in early October 2000, and given the design ...

                                               

Phoebe (moon)

Phoebe is a moon which goes around the planet called Saturn. It takes eighteen months for Phoebe to go all the way around Saturn. It is half made out of rock, and half made out of ice. The ground on Phoebe is black, which means that it is very da ...

                                               

Rings of Rhea

The Saturnian moon Rhea may have a thin ring system with three narrow bands in a disk of solid particles. These would be the first rings seen around a moon. The discovery was announced in the journal Science on March 6 2008. In November of 2005 t ...

                                               

S/2004 S 4

S/2004 S 4 is the designation of an object that astronomers do not know for sure if it exists seen orbiting Saturn within the closer part of the F ring on 21 June, 2004. It was seen while J. N. Spitale was trying to confirm the orbit of another o ...

                                               

S/2004 S 6

S/2004 S 6 is the designation of a dusty object seen orbiting Saturn very close to the F ring. It is not clear whether it is only a clump of dust, or if there is a solid small moon at its core. It was first seen by scientists in pictures taken by ...

                                               

Saturns Norse group of satellites

The Norse group is a collection of moons of the planet Saturn that go around the planet in a different direction to the spin of Saturn. They also go in an odd ellipsis direction instead of a circle. The names of this group come from gods from Nor ...

                                               

Shangri-La (Titan)

Shangri-La is a large, dark area on Saturns moon Titan. It is at 10°S 165°W. The place is named after Shangri-La, the imaginary valley in Tibet. Some people think it is a very wide plain of dark material. These broad, dark areas of Titan may have ...

                                               

Siarnaq (moon)

Siarnaq or Saturn XXIX, is a non-spherical moon of Saturn. It was found by Brett J. Gladman, et al. in 2000 and given the designation S/2000 S 3. It was named in August 2003 after the giant Siarnaq also known as Sedna in Inuit mythology, it is th ...

                                               

Themis (hypothetical moon)

On April 28, 1905, the American astronomer William H. Pickering said that he had found a tenth moon of the planet Saturn. Pickering named the moon Themis. No other astronomer has ever seen the moon that Pickering said he saw. Because of this, ast ...

                                               

Titan (moon)

Titan is one of Saturns moons. It was found by Christiaan Huygens on 25 March 1655. Titan is a unique moon because it is the solar system’s only moon to have an atmosphere. Titan is the largest moon of Saturn and the second largest in the Solar S ...

                                               

Cressida (moon)

Cressida is a closer moon to Uranus. It was found from the images taken by Voyager 2 on 1986-01-09, and was given the designation S/1986 U 3. It was named after the Trojan daughter of Calchas, a tragic heroine who appears in William Shakespeares ...

                                               

Ferdinand (moon)

Ferdinand is the farthest retrograde non-spherical moon of Uranus. It was found by Matthew J. Holman, John J. Kavelaars, Dan Milisavljevic, and Brett J. Gladman on August 13, 2001 and given the designation S/2001 U 2. Despite being seen again on ...

                                               

Juliet (moon)

Juliet is a closer moon to Uranus. It was found from the images taken by Voyager 2 on 1986-01-03, and was given the designation S/1986 U 2. It is named after the heroine of William Shakespeares play Romeo and Juliet. It is also designated Uranus ...

                                               

Margaret (moon)

Margaret is the only prograde non-spherical moon of Uranus. It was found by Scott S. Sheppard, et al. in 2003 and given the designation S/2003 U 3. Confirmed as Uranus XXIII, it was named after the servant of Hero in William Shakespeares play Muc ...

                                               

Oberon (moon)

Oberon is the farthest big moon of the planet Uranus. It is made of about half ice and half rock. With a mean radius of about 760 km, Oberon is the second biggest moon of Uranuss 27 moons. It orbits Uranus about every 13.4 days. It was found on J ...

                                               

Ophelia (moon)

Ophelia is a closer moon of Uranus. It was found from the images taken by Voyager 2 on January 20, 1986, and was given the designation S/1986 U 8. It was not seen until the Hubble Space Telescope saw it in 2003. Ophelia was named after the daught ...

                                               

Sycorax (moon)

Sycorax is one of Uranus moons. It is the biggest retrograde non-spherical one of its moons. Sycorax was found on September 6, 1997 by Brett J. Gladman, Philip D. Nicholson, Joseph A. Burns, and John J. Kavelaars. They found it using the 200-inch ...

                                               

Titania (moon)

Titania was found on January 11, 1787 by William Herschel. He reported it and Oberon the same year. He later reported four more moons, which turned out to be spurious.

                                               

Umbriel (moon)

The name "Umbriel" and the names of all four moons of Uranus then known were suggested by John Herschel in 1852 at the request of Lassell. Lassell had earlier supported Herschels 1847 naming scheme for the seven then-known moons of Saturn and had ...

                                               

Extrasolar planet

An extrasolar planet is a natural planet in a planetary system outside our own solar system. In 2013, estimates of the number of terrestrial planets in the Milky Way ranged from at least 17 billion to at least 144 billion. The smaller estimate st ...

                                               

70 Virginis b

70 Virginis b is an extrasolar planet that is around 60 light-years away from the Earth in the constellation of Virgo. The finding of this planet was announced in 1996 by astronomers Geoffrey Marcy and R. Paul Butler. 70 Virginis was one of the f ...

                                               

Gliese 581 c

Gliese 581 c is a exoplanet that orbits the red dwarf star Gliese 581. It is located about 20 light years away in the Libra. It is about six times as massive as Earth, and circles its star about 11 million kilometers from it. It takes it 13 days ...

                                               

Gliese 667 Cc

Gliese 667 Cc is an extrasolar planet 22.18 light years away. It orbits around the red dwarf star Gliese 667 C, one of the Gliese 667 triple star system. The system is in the constellation of Scorpius. It is the most Earth-like planet in 50 light ...

                                               

Gliese 832c

Gliese 832c is a extrasolar planet that goes around the red dwarf Gliese 832. It is found about 16 light years from Earth in the Grus constellation. It has 5.2 times the mass of Earth, and has a radius of 1.5 times Earths radius. The planet is th ...

                                               

Kepler-186f

Kepler-186f is a exoplanet that goes around the red dwarf star Kepler 186. It is over 580 light years away in the Cygnus constellation. Kepler-186f was discovered in 2014 by the Kepler spacecraft. It is in the habitable zone of its star, so liqui ...

                                               

Kepler-22b

Kepler-22b is an extrasolar planet orbiting G-type star Kepler-22. It is located about 600 light years away from Earth in the constellation Cygnus. It was found by NASAs Kepler Space Telescope. It is also the first known planet to orbit within th ...

                                               

Kepler-62e

Kepler-62e is a super-Earth exoplanet that circles in the habitable zone around the star Kepler-62. It is over 1.200 light years away in the direction of the Lyra constellation. It was discovered by the Kepler Space Observatory in 2013. The plane ...

                                               

Minor planet designation

Minor planet designations are number-name combinations given by the Minor Planet Center, a part of the IAU. They are used for dwarf planets and small Solar System bodies such as asteroids, but not comets. They are given to a body once its orbit i ...

                                               

Mercury (planet)

Mercury is the smallest planet in the Solar System. It is the closest planet to the sun. It makes one trip around the Sun once every 87.969 days. Mercury is bright when it is visible from Earth, ranging from −2.0 to 5.5 in apparent magnitude. It ...

                                               

Outer planet

The outer planets are planets in the Solar System that are beyond the asteroid belt. The four planets; Jupiter, Saturn, Uranus and Neptune are gas giants. All four of these planets have planetary rings which are made up of dust and other particles.

                                               

Vulcan (hypothetical planet)

Vulcan was a theoretical planet. In the 19th century, the planet was thought to orbit close to the sun. Its gravitational pull would explain changes seen between the perihelion advance of Mercury from that predicted by Classical Mechanics. The th ...

                                               

Terrestrial planet

A terrestrial planet is mostly made of rock. Earth is the "original" terrestrial planet. When astronomers started understanding the kinds of planet they extended the term to include our nearest rocky neighbours: Mercury, Venus and Mars. It is oft ...

                                               

Earth phase

The Earth phase, Terra phase, Terrestrial phase or phase of the Earth, is the shape of the directly sunlit portion of the Earth as viewed from the Moon. From the Moon, the Earth phases gradually and cyclically change over a period of about a mont ...

                                               

Venus

Venus is the second planet from the sun. It has a day longer than a year. The year length of Venus is 225 Earth days. The day length of Venus is 243 Earth days. It is a terrestrial planet because it has a solid, rocky surface like other planets i ...

                                               

Ocean planet

An ocean planet is a type of terrestrial planet that contains a high amount of water. This may be a planet with ocean covering all of its surface, or a planet with a ocean bellow its surface. Ocean planets are also the name of planets that have o ...

                                               

List of stars

The following is a small list of stars. On this list, stars should be placed by their English wiki title, unless a common name is clearly more used. 61 Cygni 51 Pegasi 70 Virginis 40 Eridani

                                               

List of brightest stars

Below are the 50 brightest individual stars in order of their average apparent magnitudes in the visible spectrum as seen from Earth. To the naked eye on a clear dark night, in a place far from cities and lights, the total number of stars visible ...

                                               

List of nearest stars

This list of the nearest stars to Earth is by distance in light years. These distances are taken from parallax data determined by the Research Consortium on Nearby Stars. The sources for this information were the Yale Parallax Catalog. Stars move ...

                                               

Accretion disk

An accretion disk is an astronomical term. It describes a disc of material being drawn in by gravity to a centre of mass, such as a star or black hole. As the material comes in, it spins round the central body and radiates energy. The central bod ...

                                               

Cygnus X-1

Cygnus X-1 is a well-known galactic X-ray source. It is thought to be a black hole in the constellation Cygnus. It was discovered in 1964 during a rocket flight, and is one of the strongest X-ray sources seen from Earth. Cygnus X-1 was the first ...

                                               

Event horizon

For the movie, see Event Horizon In general relativity, an event horizon is the part of a black hole where light cannot escape. Imagine the black hole to be like a ball that you could see in a large spot of emptiness. The event horizon would then ...

                                               

Gravitational singularity

A gravitational singularity is a term used to describe the center of a black hole where gravity is thought to approach infinity. In the center of each black hole is a singularity, a point where infinite density develops as spacetime approaches it ...

                                               

Hawking radiation

Hawking radiation is black body radiation which is emitted by black holes, due to quantum effects near the event horizon. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974. As a result ...

                                               

Naked singularity

In general relativity, a naked singularity is a gravitational singularity that is viewable from the outside. The event horizon is like a bubble which surrounds a black hole. Inside the event horizon, the pull of the light cannot escape, so we are ...