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Rapidly rotating stars emitting intense radio waves are called ___.

A. Pulsars

B. Quasuars

C. Neutron stars

D. All of the above

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  1. The most important constituent of the Sun's mass is.HydrogenHeliumSiliconIron
  2. What is the difference between a lake and a tank?
  3. What is the temperature of the sun estimated at approximately?
  4. Polar Auroras are
  5. How much time does the earth take in completing one rotation on its axis in relation to sun?
  6. The solar eclipse takes place when
  7. What is the Southern Cross?
  8. In which direction la the Tropic oC Capricorn in relation to the Equator?
  9. Distance between the Moon and the Earth is 1. Approximately 386000 km2. 1.25 light seconds
  10. Which planet rotates on its axis from north to south?
  11. Nearest star to the earth is _____.
  12. Sun-rays reaches earth in (approximately)
  13. Polar diameter of the Eearth is.
  14. Sunspots are
  15. What is the name given to the widened rivermouth found at the point a river enters the sea?
  16. When a year divisible by 4 and not divisible by 400 is called
  17. What is the shape of our galaxy 'Milky Way'?
  18. Brightest planet of our Solar System is _____.
  19. On the summer solstice in the Northern Hemisphere which of the hollowing latitudes will have the longest…
  20. Planet with maximum satellites is _____.
  21. When the earth is at its minimum distance from the Sun, it is said to be
  22. The date on which the Sun is vertical over the 'Tropic of Cancer' is
  23. Hale Bopp' is a newly discovered ____.
  24. Which planet rotates on its axis from east to west?
  25. The permanent tilt of the Earth's axis and the revolution of the Earth in its orbit together cause
  26. What is the most accurate description of the shape of the earth?
  27. The Sun contains over ___of the total mass of the Solar System.
  28. What proportion of the mass of the earth does the mass of the Moon equal?
  29. Which planet is called 'red planet'?
  30. Among the following which planet takes maximum time for one revolution around the Sun?