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A 'black hole' is a body in space which does not allow any radiation to come out. This property is due to its

A. Very small size

B. Very large size

C. Very high density

D. Very low density

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  1. To a space traveller stationed in Moon, during the day time the lunar sky will appear
  2. A Light Year measures
  3. The time period elapsing between one New Moon and the next is approximately
  4. What is the name given to the widened rivermouth found at the point a river enters the sea?
  5. Which of the following statements are true?1. Inner Planets are alternatively called Terrestrial Planets.2.…
  6. Sunspots are
  7. How much time does the earth take in completing one rotation on its axis in relation to sun?
  8. The date on which the Sun is vertical over the 'Tropic of Cancer' is
  9. A 'black hole' is a body in space which does not allow any radiation to come out. This property is due…
  10. A system of millions and millions of galaxies are called _____.
  11. Which planet does take the least time in completing one revolution around the Sun?
  12. Sun revolves around galaxy once in every 250 million years, this length of time is called _____.
  13. The dark patches, associated with the Sun storms present in Sun are called
  14. What is the name of the planet which takes 88 days to make one revolution of the Sun?
  15. Distance between the Moon and the Earth is 1. Approximately 386000 km2. 1.25 light seconds
  16. Which star la called the brightest star (Dog star)?
  17. What is the most accurate description of the shape of the earth?
  18. Largest planet of our Solar System is _____.
  19. A celestial body consisting of a gaseous cloud enveloping a bright nucleus moving around the Sun in…
  20. The Jupiter's atmosphere comprises mainly of
  21. The group of small pieces of rock revolving round the Sun between the orbits of Mars and Jupiter are…
  22. The visible surface of the sun is known as
  23. Average density of the Earth is ( relative to water) __.
  24. The planet of lowest density (0.69) is __ .
  25. How much is the variation In distance between the Earth and the Sun during aphelion and perihelion?
  26. Earth revolves round the Sun In an orbit once In every __.
  27. A meteor is
  28. In which of the following planets, the Great Red Spot has been the special feature?
  29. Rapidly rotating stars emitting intense radio waves are called ___.
  30. The Sun experiences magnetic storms and this Interferes with the magnetic field oC the Earth and produces…