Definitions of Units of Physical quantities

There are 7 fundamental physical quantities that we use in our daily life. They are length(m) mass(kg) time(s) electric current(A) temperature(K) amount of substance(n) luminous intensity(L) A system called as the System International(SI) decided to define these fundamental quantities. The definitions are as follows Meter: The meter is the distance travelled by light in 1/29979248 seconds. Kilogram: The Kilogram is the mass of a cylinder made of platinum iridium alloy kept at the International Bureau of Weights and Measures at...

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A New Planet

New Planet Kepler-16b discovered by NASA in 2011. Scientists across the world are perplexed. The discovery of a star that orbits around two suns has stunned many. Others are amazed. But it may take years to verify the reports coming from a NASA satellite Kepler, launched two years ago that a star some two hundred light years away orbits around two suns. Being called Kepler or Tatooine planet, it is made up of hard rocks where gasses...

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Roche Lobe

Gravitational force holds each and every particle of the star within a range of distance. The pull of gravity is effective for some distance and after which the effect fades away. For example: The gravitational pull of the Earth is effective only for 1000 km until which the atmosphere extends. After that, the pull is no longer felt and an object can easily escape to the vacuum. The same applies for a star. The region of space around...

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