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Murchison meteorite

The Murchison meteorite is named after the place it fell: Murchison, Victoria, Australia. It is large and it was seen falling. It is one of the most studied meteorites, since it belongs to a group of meteorites rich in organic compounds, known as ...


Permian–Triassic extinction event

The Permian/Triassic extinction event was the largest extinction event in the Phanerozoic eon. 57% of all biological families, 83% of all genera, 96% of all marine species and 70% of all terrestrial vertebrates became extinct. It is the only know ...



The Perseids are prolific meteor showers associated with the comet Swift–Tuttle. The point they appear to come from is in the constellation Perseus. They come into the sky regularly mid-July to late August. Date of peak shower is August 24th.


Rochechouart crater

The Rochechouart crater is a place in France where a meteorite, a rock from outer space, hit the surface of the Earth, leaving a crater. The meteorite hit came during the Jurassic or Triassic period. Rochechouart is between the Haute-Vienne and t ...


Natural satellite

A natural satellite in astronomy is a smaller body which moves around a larger body. The smaller body is held in orbit by gravitation. The term is used for moons which go around planets, and it is also used for small galaxies which orbit larger g ...



In art and symbolism, a crescent is generally the shape produced when a circular disk has a segment of another circle removed from its edge, so that what remains is a shape enclosed by two circular arcs of different diameters which intersect at t ...


Dysnomia (moon)

Dysnomia is the only known moon of the dwarf planet Eris. It was found on September 10, 2005 by Michael E. Brown and his team at the W. M. Keck Observatory. It is probably about 600 km in diameter, although it may be up to 800 km in diameter. The ...


Icy moon

An icy moon is a natural satellite with ice on its surface. Some icy moons might have liquid oceans under the ice. All icy moons in the Solar System are with the giant planets. An example of an icy moon is Europa.


Menoetius (moon)

Menoetius is the only moon of the asteroid Trojan 617 Patroclus. In 2001, scientists found that Patroclus is a binary system, made up of two asteroids of about the same size. It is one of 18 binary Trojan asteroids known to exist. In 2006, good m ...


Moons of Haumea

The dwarf planet Haumea has two known moons, Hiiaka and Namaka. They are named after the daughters of the Hawaiian goddess of fertility and childbirth, Haumea. Hiiaka was the goddess of dance, and Namaka was the goddess of water and the sea. The ...



A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases in a galaxy. The Persian astronomer, Abd al-Rahman al-Sufi, mentioned a true nebula for the first time in his book, Book of Fixed Stars 964. He said that there wa ...


Barnards Loop

Barnards Loop is an emission nebula in the constellation of Orion. It is about 1.600 light-years away from Earth. It is part of the Orion complex. It is a semicircular arc that is about 300 light-years across. In the center of Bernards Loop are t ...


Carina nebula

The Carina nebula is a large, bright nebula. It is around 7.500 light years from Earth and has over 14.000 stars. It appears in the constellation of Carina in the Carina–Sagittarius Arm of the Milky Way. The Carina nebula was discovered by Nicola ...


Cave nebula


Coalsack nebula

The Coalsack dark nebula is the most prominent dark nebula in the skies. It can easily be seen with the naked eye as a dark patch silhouetted against the southern Milky Way. It was known pre-historically in the Southern Hemisphere and was observe ...


Crab Nebula

The Crab Nebula is a supernova remnant and pulsar wind nebula in the constellation of Taurus. The nebula was observed by John Bevis in 1731; it corresponds to a bright supernova recorded by Chinese and Islamic astronomers in 1054. In 1840, astron ...


Dumbbell nebula

The Dumbbell nebula is a planetary nebula in the constellation Vulpecula. It is about 1.360 light years away from earth. The Dumbbell nebula was the first planetary nebula to be discovered; by Charles Messier in 1764.


Eagle nebula

The Eagle nebula is a young open cluster of stars in the constellation Serpens. The nebula is catalogued as Messier 16 M16, and as NGC 6611. It is also called the Star Queen nebula and The Spire. These last names refer to visual impressions of th ...


Emission nebula

An emission nebula is a cloud of plasma emitting light in many colors. The glowing is caused by a star being near the nebula. There are many types of emission nebula. H II regions are caused when stars are forming and are very hot, causing the pl ...


Flame nebula

The Flame nebula, also known as NGC 2024, is a nebula in the constellation Orion. It has no well defined edge. It is about 900 to 1.500 light-years away. The nebula is part of the Orion complex. This is a star-making area that also has the famous ...


H II region

An H II region is a region where huge blue stars are formed from hydrogen. They are named after the ionised atomic hydrogen which they produce: H II. The stars form inside a large cloud of hydrogen gas. The short-lived blue stars formed in these ...


Helix nebula


Horsehead nebula

The Horsehead nebula is a dark nebula in the constellation Orion. The nebula is part of the much larger Orion complex. The nebula is located just to the south of the star Alnitak. Alniak is the farthest east on Orions Belt. It is part of the much ...


IC 2118


IC 418


Interstellar cloud

An interstellar cloud is a denser-than-average part of the interstellar medium. It is matter and radiation in the space between the star systems in a galaxy. An interstellar cloud is formed by the gas and dust particles from a red giant in its la ...


Iris nebula


Kronberger 61

Kronberger 61, also known as the "soccer ball", is a Nebula discovered by an amateur astronomer in January 2011. Newer images of this nebula were taken by the Gemini Observatory. The nebula was discovered by Austrian Mattias Kronberger, a member ...


Lagoon Nebula

The Lagoon nebula, also known as Messier 8 and NGC 6523, is an emission nebula, H II region and interstellar cloud in the constellation of Sagittarius. It is about 4.100 light-years away from Earth.






Molecular cloud

A molecular cloud is a kind of cloud in space. It has enough density and size so that molecules can form, usually molecules of hydrogen. Molecular hydrogen is not easy to find. Instead astronomers use infrared telescopes and radio telescopes to l ...


NGC 1999


NGC 2174


NGC 6302

NGC 6302, also known as the bug nebula or the butterfly nebula, is a planetary nebula in the constellation of Scorpius. It is about 3.4 thousand light-years away from Earth. The spectrum of NGC 6302 shows that its central star is one of the hotte ...


NGC 6334


NGC 6543


NGC 6559

NGC 6559 is an star forming region in the constellation of Sagittarius. It is about 5.000 light years from earth. About 7 light years across, it is a dense cloud of dust that hides other stars.


NGC 7538


North America nebula

The North America nebula is an emission nebula in the Cygnus constellation. It is about 1.600 light-years away from Earth.


Omega Nebula

The Omega Nebula is an H II region in the constellation of Sagittarius. It is about 5.500 light-years away from Earth. It was discovered by Philippe Loys de Cheseaux in 1745. Charles Messier added it to his catalog as M17 on the night of 3 June 1 ...


Orion nebula

The Orion nebula, or Messier 42, M42, or NGC 1976, is a diffuse nebula. It is visible to the naked eye in the night sky. It is exceptionally bright because it has O-type stars at its core. They are the hottest and brightest stars. The nebula is s ...


Owl nebula


Pease 1

Pease 1 is a planetary nebula. It is in the globular cluster Messier 15 in the constellation of Pegasus. It is the first planetary nebula discovered within a globular cluster. Three more have been discovered in other clusters.


Pelican nebula


Planetary nebula

A planetary nebula is a nebula that is made up of gas and plasma. They are made by certain types of stars later in their life. They look like planets through small optical telescopes. They do not last for long compared to a star, only tens of tho ...


Reflection nebula

In astronomy, a reflection nebula is a cloud of dust which reflects the light of a star or many stars. The light from the nearby stars is not hot enough to ionize the gas of the nebula to make an emission nebula. However, is enough to make the du ...


Saturn Nebula


Shapley 1

Shapley 1 is a planetary nebula in the constellation of Norma. The nebula was discovered by the astronomer Harlow Shapley in 1936 and it is about 1.000 lightyears away from Earth.


Tarantula nebula

The Tarantula nebula is an H II region in the Large Magellanic Cloud. It was originally thought to be a star, but in 1751 Lacaille recognized it was a nebula. The Tarantula nebula has an apparent magnitude of 8. Considering its distance of 49 kpc ...

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