Mars Articles

• Space Missions
  Space Exploration
  NASA
  Uranus
  Space Probes
  Jupiter
   
  

  Voyager program

  The Voyager program consisted of a pair of unmanned scientific probes, Voyager 1 and Voyager 2, launched in 1977. They were sent to study Jupiter and Saturn, using an advantageous planetary alignment ... > more
• Asteroids, Comets and Meteors
  Solar System
  Pluto
  Astronomy
  Satellites
  Solar Flare
   

  Near-Earth asteroid

  Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earth's orbit. Some NEAs' orbits intersect Earth's so they pose a collision danger. On the other hand, NEAs are most easily ... > 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
• Venus
  Solar System
  Sun
  NASA
  Space Exploration
  Space Missions
   
  

  Transit of Venus

  A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and the Earth, obscuring a small portion of the Sun's ... > more
• Space Probes
  Space Exploration
  Space Station
  NASA
  Space Missions
  Solar Flare
   
  

  Spacecraft propulsion

  Spacecraft propulsion is used to change the velocity of spacecraft and artificial satellites, or in short, to provide delta-v. There are many different methods. Each method has drawbacks and ... > more
• Solar System
  Uranus
  Moon
  Pluto
  Jupiter
  Satellites
   
  

  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
• Solar System
  Pluto
  Kuiper Belt
  NASA
  Space Exploration
  Asteroids, Comets and Meteors
   
  

  Ceres (dwarf planet)

  Ceres, also designated 1 Ceres or (1) Ceres, is the smallest dwarf planet in the Solar System and the only one located in the main asteroid belt. With a diameter of about 950 km, Ceres is by far the ... > more
• Solar System
  Extrasolar Planets
  Kuiper Belt
  Pluto
  Eris (Xena)
  Jupiter
   
  

  Planet

  The International Astronomical Union defines "planet" as a celestial body that, within the Solar System that is in orbit around the Sun; has sufficient mass for its self-gravity to overcome rigid ... > more
• Mars
  Solar System
  Space Exploration
  Asteroids, Comets and Meteors
  Extrasolar Planets
  NASA
   
  

  Extraterrestrial life

  Extraterrestrial life is life that may exist and originate outside the planet Earth, the only place in the universe currently known by humans to support life. Its existence is currently purely ... > more
• Space Station
  NASA
  Space Missions
  Space Exploration
  Astronomy
  Space Probes
   
  

  Space suit

  A space suit is a complex system of garments and equipment and environmental systems designed to keep a person alive and comfortable in the harsh environment of outer ... > more
• Space Station
  Space Missions
  ESA
  Space Exploration
  NASA
  Space Probes
   
  

  European Space Agency

  The European Space Agency (ESA), established in 1975, is an inter-governmental organisation dedicated to exploration of space with currently 17 member states. ESA has ambitious space plans that may ... > more
• Pluto
  Kuiper Belt
  Solar System
  Moon
  Jupiter
  Satellites
   
  

  Charon (moon)

  Charon, discovered in 1978, is, depending on the definition employed, either the largest moon of Pluto or one member of a double dwarf planet with Pluto being the other member. With the discovery in ... > more

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