Asteroid, Comet, Meteor Articles

• Solar System
  Uranus
  Moon
  Pluto
  Jupiter
  Astronomy
   
  

  Uranus' natural satellites

  Uranus has 27 known moons. The first two moons (Titania and Oberon) were discovered by William Herschel on March 13, 1787. Two more moons (Ariel and Umbriel) were discovered by William Lassell in ... > more
• Mars
  NASA
  Space Missions
  Solar System
  Space Exploration
  Astronomy
   
  

  Mars

  Mars is the fourth planet from the Sun in our solar system. It is named after Mars, the Roman god of war. Mars has also earned the nickname "The Red Planet" due to the reddish appearance it has when ... > more
• Space Station
  Asteroids, Comets and Meteors
  NASA
  Space Exploration
  Space Probes
  Satellites
   
  

  Space debris

  Space debris or orbital debris, also called space junk and space waste, are the objects in orbit around Earth created by man that no longer serve any useful purpose. They consist of everything from ... > more
• Solar System
  Astronomy
  Pluto
  Sun
  Asteroids, Comets and Meteors
  Kuiper Belt
   
  

  Solar System

  The Solar System consists of the Sun and the other celestial objects gravitationally bound to it: the eight planets, their 165 known moons, three dwarf planets (Ceres, Pluto, and Eris and their four ... > more
• Uranus
  Solar System
  Astronomy
  Pluto
  Jupiter
  Moon
   
  

  Uranus

  Uranus is the seventh planet from the Sun. It is a gas giant, the third largest by diameter and fourth largest by mass. NASA's Voyager 2 is the only spacecraft to have visited the planet and no other ... > more
• Extrasolar Planets
  Stars
  Solar System
  Astronomy
  Sun
  Mars
   
  

  Planetary habitability

  Planetary habitability is the measure of an astronomical body's potential to develop and sustain life. It is generally assumed that any extraterrestrial life that might exist will be based on the ... > more
• Jupiter
  Solar System
  Moon
  Pluto
  Kuiper Belt
  Astronomy
   
  

  Jupiter's natural satellites

  Jupiter has 63 known natural satellites. Although claims are made for the observation of one of Jupiter's moons by Chinese astronomer Gan De in 364 BC, the first certain observations of Jupiter's ... > more
• Geomagnetic Storms
  Sun
  Solar Flare
  Renewable Energy
  Energy and the Environment
  Northern Lights
   
  

  Solar wind

  A solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of a star. When originating from stars other than the Earth's Sun, it is sometimes called a ... > more
• Saturn
  Solar System
  Astronomy
  Space Exploration
  Space Probes
  Moon
   
  

  Saturn

  Saturn is the sixth planet from the Sun. It is a gas giant, the second-largest planet in the solar system after Jupiter. Saturn has a prominent system of rings, consisting of mostly ice particles ... > more
• Satellites
  Pluto
  Moon
  Astronomy
  NASA
  Asteroids, Comets and Meteors
   
  

  Satellite

  A satellite is any object that orbits another object (which is known as its primary). Satellites can be manmade or may be naturally occurring such as moons, comets, asteroids, planets, stars, and ... > more

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