81 A constellation is
A group of fixed stars
82 How many constellations are known so far?
Eighty Eight (88)
83 The scientific device used for the measurement of intensity of light is
Photometer
84 Blue Giants are
Bright extremely hot galaxies believed to be on the outer limits of the universe
85 Sphygmomanometer is an instrument used for
Measuring blood pressure
86 Pisciculture is the art of
Artificial rearing of fish
87 Hypsometer is the device for measuring
The height above the sea-level
88 Barometer is an instrument used for measuring
Atmospheric pressure
89 Mechanic, the branch of Physics, is connected with
Action of forces upon bodies
90 Low atmospheric pressure forecasts
Storms
