Extrasolar Planet Articles

• Alternative Fuels
  Astrophysics
  Fuel Cells
  Organic Chemistry
  Galaxies
  Chemistry
   
  

  Hydrogen

  Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic, univalent, tasteless, ... > more
• Asteroids, Comets and Meteors
  Near-Earth Object Impacts
  Atmosphere
  Earth Science
  Geology
  Mars
   
  

  Meteor

  A meteor is the visible path of a meteoroid that enters the Earth's (or another body's) atmosphere, commonly called a shooting star or falling star. A meteor is a meteoroid that has entered the ... > more
• Space Station
  Space Exploration
  NASA
  Space Probes
  Space Missions
  Astronomy
   
  

  Space exploration

  Space exploration is the physical exploration of outer space, both by human spaceflights and by robotic spacecraft. While the observation of objects in space—known as astronomy—pre-dates ... > more
• Space Telescopes
  Space Exploration
  NASA
  Satellites
  Astronomy
  Cosmic Rays
   
  

  Telescope

  A telescope is an instrument designed for the observation of remote objects. The term usually refers to optical telescopes, but there are telescopes for most of the spectrum of electromagnetic ... > more
• Solar System
  Saturn
  Moon
  Pluto
  Jupiter
  Astronomy
   
  

  Saturn's natural satellites

  Saturn is currently known to have 56 moons, many of which were discovered very recently, and 3 additional un-confirmed, hypothetical moons. However, a precise number of moons can never be given, as ... > more
• Moon
  Solar System
  Pluto
  Space Missions
  NASA
  Jupiter
   
  

  Moon

  The Moon is Earth's only natural satellite. The average distance from the Earth to the Moon is 384,399 kilometres (238,854 mi), which is about 30 times the diameter of the Earth. At this distance, it ... > more
• Atmosphere
  Geomagnetic Storms
  Northern Lights
  Solar Flare
  Sun
  Ozone Holes
   
  

  Ionosphere

  The ionosphere is the part of the atmosphere that is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical ... > more
• Space Station
  Space Probes
  Space Exploration
  NASA
  Astronomy
  Space Telescopes
   
  

  Outer space

  Outer space, also simply called space, refers to the relatively empty regions of the universe outside the atmospheres of celestial bodies. Outer space is used to distinguish it from airspace (and ... > more
• Sports Science
  Ancient Civilizations
  Fossils
  Solar Flare
  Technology
  Sun
   
  

  Antikythera mechanism

  The Antikythera mechanism is an ancient mechanical analog computer (as opposed to digital computer) designed to calculate astronomical positions. It was discovered in the Antikythera wreck off the ... > more
• Stars
  Extrasolar Planets
  Astronomy
  Black Holes
  Galaxies
  NASA
   
  

  Star Trek: The Original Series

  Star Trek is a science fiction television series created by Gene Roddenberry which aired from September 8, 1966 through June 3, 1969, with a total of 79 episodes aired and 80 episodes produced. ... > more

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