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Space Science
Play this  Quiz Game  On your phone 21 - International Astronomical Union, 22 - Sirius, 23 - Venus, 24 - India, 25 - 58,232 km, 26 - 365.25 days,   27 - Hans Lippershey, 28 - 1.62 m/s2, 29 - 430 - 770 THz, 30 - Fusion.

21. IAU stands for:

           International Astronomical Unit

           International Astronomical Union

           International Aviation Union

           International Aeronautics Union


22. Which is the brightest star in the sky?

           Vega

           Arcturus

           Sirius

           Canopus


23. Which is the brightest object in the night sky after Moon?

           Saturn

           Venus

           Gienah

           Jupiter


24. Which country's satelite reached Mars on its first attempt?

           Russia

           USA

           India

           European Space Agency


25. What is the radius of Saturn?

           58,232 km

           68,944 km

           100,200 km

           94,840 km


26. In astronomy, a Julian year is:

           270 days

           365.25 days

           365 days

           366 days


27. Who invented telescope?

           Johannes Kepler

           Galileo Galilei

           Hans Lippershey

           Christiaan Huygens


28. What is the surface gravity of earth's moon?

           2.33 m/s2

           1.62 m/s2

           8.7 m/s2

           4.24 m/s2


29. What is the frequency of visible light?

           430 - 770 THz

           200 - 770 THz

           240 - 860 THz

           40 - 800 Thz


30. What type of nuclear reaction takes place in sun?

           Neutron capture

           Fusion

           Fission

           Inelastic scattering