Black hole is a region of a space-time which exhibits a strong gravitational acceleration that doesn't allow any object to escape from it. This region was proposed by an English astronomical pioneer in a letter of 1784. However, through researches, the body was proposed to be having the same density as the Sun. Take this quiz about Black Hole.
Event horizon
Accretion disk
Neuron stars
Quartz
Astronomers
Radiologists
Radiographers
Geologists
Gravitational pull
Gravitational force
Gravitational potential
Gravitational acceleration
Reflection of no light
Reflection of light
Refraction
Different
1967
1966
1965
1964
Physical curiosity
Chemical curiosity
Mathematical curiosity
Geographical curiosity
1958
1956
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1959
Space
Mars
Moon
Earth
David Finkelstein
Galileo Galilee
Isaac Newton
Michael Faraday
Event plane
Acceleration stage
Event horizon
Escape horizon