Untitled

• andromeda galaxy


  The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224. Andromeda has a D25 isophotal diameter of about 46.56 kiloparsecs (152,000 light-years) and is approximately 765 kpc (2.5 million light-years) from Earth. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the princess who was the wife of Perseus in Greek mythology.
• is astronomy hard?


  In fact, astronomy is a challenging science, but not because the universe is inaccessible in the conventional sense
• How to become an astronomer?

  Most research astronomers have doctorate degrees in physics or astronomy and also bachelor's and/or master's degrees in a physical science, usually physics or astronomy. I
• What are the 12 phases of the moon called?

  • new Moon.
  • waxing crescent Moon.
  • first quarter Moon.
  • waxing gibbous Moon.
  • full Moon.
  • waning gibbous Moon.
  • last quarter Moon.
  • waning crescent Moon
• meteorid


  A meteoroid is a small rocky or metallic body in outer space. Meteoroids are distinguished as objects significantly smaller than asteroids, ranging in size from grains to objects up to a meter wide. Objects smaller than meteoroids are classified as micrometeoroids or space dust. Many are fragments from comets or asteroids, whereas others are collision impact debris ejected from bodies such as the Moon or Mars.
• asteroid


  An asteroid is a minor planet—an object that is neither a true planet nor an identified comet— that orbits within the inner Solar System. They are rocky, metallic, or icy bodies with no atmosphere. The size and shape of asteroids vary significantly, ranging from small rubble piles under a kilometer across and larger than meteoroids, to Ceres, a dwarf planet almost 1000 km in diameter.

  
• what are the origin of dark matter?

  The most prevalent explanation is that dark matter is some as-yet-undiscovered subatomic particle, such as weakly interacting massive particles (WIMPs) or axions. The other main possibility is that dark matter is composed of primordial black holes.
• What is the basis of dark matter?

  Dark Matter: Possibly a Mix of Neutralinos, Axions, and Photinos. As it stands now, scientists believe that dark matter is probably made of three kinds of particles — neutralinos, axions, and photinos. Neutrinos are a type of large neutrino, an electrically neutral particle with a very small mass.
• parsec

  1. a unit of distance used in astronomy, equal to about 3.26 light years (3.086 × 1013 kilometres). One parsec corresponds to the distance at which the mean radius of the earth's orbit subtends an angle of one second of arc.
• kiloparsecs


  A kiloparsec (kpc) is a measurement of distance equal to 1,000 parsecsor 3,260 light years.