Neptune Articles

• Sun
  Black Holes
  Moon
  Asteroids, Comets and Meteors
  Solar Flare
  Pluto
   
  

  Precession

  Precession refers to a change in the direction of the axis of a rotating object. In certain contexts, "precession" may refer to the precession that the Earth experiences, the effects of this type of ... > more
• Asteroids, Comets and Meteors
  Near-Earth Object Impacts
  Mars
  Solar System
  Geomagnetic Storms
  Sun
   
  

  Meteorite

  A meteorite is a small extraterrestrial body that impacts the Earth's surface. While in space they are called meteoroids, and while falling through Earth's atmosphere they are called meteors. These ... > more
• Sun
  Solar Flare
  Northern Lights
  Satellites
  Astronomy
  Solar System
   
  

  Geomagnetic storm

  A geomagnetic storm is a temporary disturbance of the Earth's magnetosphere. Associated with solar coronal mass ejections, coronal holes, or solar flares, a geomagnetic storm is caused by a solar ... > more
• Near-Earth Object Impacts
  Asteroids, Comets and Meteors
  Geology
  Saturn
  Earth Science
  Moon
   
  

  Impact crater

  An impact crater is a circular depression on a surface, usually referring to a planet, moon, asteroid, or other celestial body, caused by a collision of a smaller body (meteor) with the ... > more
• Astrophysics
  Astronomy
  Black Holes
  Space Telescopes
  Stars
  Galaxies
   
  

  Astrophysics

  Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature and chemical composition) of astronomical ... > more
• Solar Flare
  Sun
  Northern Lights
  Solar System
  Astronomy
  Cosmic Rays
   
  

  Solar flare

  A solar flare is a violent explosion in the Sun's atmosphere with an energy equivalent to tens of millions of hydrogen bombs. Solar flares take place in the solar corona and chromosphere, heating ... > more
• Asteroids, Comets and Meteors
  Solar System
  NASA
  Astronomy
  Pluto
  Moon
   
  

  Near-Earth object

  Near-Earth objects (NEO) are asteroids, comets and large meteoroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger. Due to their size and proximity, NEOs are ... > more
• Sun
  Solar Flare
  Moon
  Solar System
  Astronomy
  Jupiter
   
  

  Eclipse

  An eclipse is an astronomical event that occurs when one celestial object moves into the shadow of another. The term is most often used to describe either a solar eclipse, when the Moon's shadow ... > 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
• Space Telescopes
  Space Exploration
  NASA
  Satellites
  Astronomy
  Black Holes
   

  Active optics

  Active optics is a relatively new technology for reflecting telescopes developed in the 1980s, which has more recently enabled the construction of a generation of telescopes with 8 metre primary ... > more

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