What is the actual mass of the sun?
  • 1.98 x 1020 kg
  • 2.0 x 1030 kg
  • 1.98 x 1030 kg
  • 2000000 kg
Which of the following planet has no satellite?
  • Mercury
  • Venus
  • Mars
  • Jupiter
Which of the following is the farthest planet in our solar system?
  • Jupiter
  • Neptune
  • Uranus
  • Saturn
What do we call the center of the comet?
  • Plasma
  • Cell
  • Nucleus
  • Atom
Suppose a new planet is discovered between Uranus and Neptune. Its time period would be
  • less than that of Neptune
  • more than that of Neptune
  • equal to that of Neptune or Uranus.
  • less than that of Uranus.
The following planet takes a minimum time for one orbit around sun
  • Earth
  • Mercury
  • Mars
  • Venus
The high elliptical object has a bright head and a gasesous tail
  • Asteroids
  • Meteors
  • Comets
  • None of the above
The tilting of earth axis is responsible for
  • change of days
  • change of seasons
  • change of tides
  • None of these
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