Star, Origin of Stars,Types of Star - gk lokam

5 November 2019

Star, Origin of Stars,Types of Star

Star, Origin of Stars,Types of Star


STARS


The stars which lies immediately above the earth's North pole and around which all other stars seems to revolve is called 
Ans : Pole Star
 
The temperature of a star's surface is indicated by
Ans : The colour of the star 
 
Blue colour of a star denotes
Ans : Maximum temperature 
 
Brightest star outside solar system 
Ans : Sirius
Star known as Dog star 
Ans : Sirius
Star nearest to the earth 
Ans : Sun
 
The Closest star in our solar system, after sun
Ans : Proxima Centauri
 
Followed by Alpha Centauri and Barnard's Star
Indian Physicist who predicted an upper limit to the mass of stars 
Ans : Chandrasekhar
 
The prediction of Chandrashekhar is called 
Ans : Chandrasekhar Limit 
 
Chandrasekhar Limit is equal to
Ans : 1.44 times the mass of sun 
 
A region of space having a gravitational field so intense that no matter or radiation can escape
Ans : Black Hole
 
A cloud of gas and dust in outer space, visible in the night sky is called 
Ans : Nebulae

SOFIA


An airborne observatory of NASA to study about the formation of stars
Ans : SOFIA
 
SOFIA
Ans : Stratospheric Observatory For Infrared Astronomy
 
Biggest airborne observatory in the world
Ans : SOFIA
 
The operation centre of SOFIA is situated in
Ans : Northern California
 
SOFIA is operated by
Ans : NASA and German Space Agency (DLR)

EVOLUTION OF STARS


Stars are born in 
Ans : Nebulae
 
The third stage of evolution of a star is
Ans : Red Giant
 
A very large star of high luminosity and low surface temperature is called
Ans : Red Giant
 
In the fourth stage, the star collapses and explodes and it will become
Ans : White Dwarf
 
The explosion of a white dwarf is called 
Ans : Supernova
 
The largest explosion that takes place in space
Ans : Supernova
 
A celestial object intermediate in size between a giant planet and a small star, believed to emit mainly infrared radiation. It is called
Ans : Brown Dwarf
 
The smallest and densest stars known to exist in the Universe
Ans : Neutron Stars

CONSTELLATION


The stars which appear in the form of closed group and form recognizable shapes are known as
Ans : Constellations 
 
The biggest constellation 
Ans : Hydra
 
The smallest constellation 
Ans : Crux
 
The organisation which gives name to the constellations
Ans : International Astronomical Union (IAU)
 
If the size of a star increases, its life period
Ans : Decrease
 
Star which is a highly magnetized, rotating neutron that emits a beam of electromagnetic radiation 
Ans : Pulsar

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