NASA Articles

• Space Probes
  Space Exploration
  Space Station
  Vehicles
  Aviation
  Sports Science
   
  

  Multistage rocket

  A multistage (or multi-stage) rocket is, like any rocket, propelled by the recoil pressure of the burning gases it emits as it burns fuel. What characterizes it as "multi-stage" is that it ... > more
• Space Station
  NASA
  Space Exploration
  Space Probes
  Space Missions
  Astronomy
   
  

  Space Shuttle program

  NASA's Space Shuttle, officially called Space Transportation System (STS), is the United States government's only manned launch vehicle currently in service. It is the first winged manned spacecraft ... > more
• Saturn
  Solar System
  Pluto
  Astronomy
  Moon
  Space Exploration
   
  

  Titan (moon)

  Titan, or Saturn VI, is the largest moon of Saturn and the second largest moon in the solar system, after Jupiter's moon Ganymede. It is roughly 50% larger than Earth's moon by diameter, and is ... > more
• Sun
  Solar Flare
  Astronomy
  Solar System
  Moon
  Northern Lights
   
  

  Solar eclipse

  A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partially obscuring Earth's view of the Sun. This configuration can only occur during a New Moon, when the ... > more
• Space Station
  NASA
  Space Exploration
  Space Missions
  Space Probes
  Astronomy
   
  

  Mir

  Mir was a highly successful Soviet (and later Russian) orbital station. It was humanity's first consistently inhabited long-term research station in space. Through a number of collaborations, it was ... > 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
• Galaxies
  Stars
  Astrophysics
  Astronomy
  Space Telescopes
  Sun
   
  

  Cepheid variable

  A Cepheid variable or Cepheid is a member of a particular class of variable stars, notable for a fairly tight correlation between their period of variability and absolute luminosity. Since the ... > more
• Venus
  Solar System
  Astronomy
  Sun
  NASA
  Space Exploration
   
  

  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 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
• Solar System
  Neptune
  Pluto
  Moon
  Jupiter
  Satellites
   
  

  Neptune's natural satellites

  Neptune has 13 known moons. The largest by far is Triton, discovered by William Lassell just 17 days after the discovery of Neptune itself. It took a hundred years to discover the second, Nereid. ... > more

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