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PSC Class 127: Universe Facts and Information

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Universe Facts and Information:

Cosmology is the study of origin and evolution of universe.

Big Bang Theory is the major work that mentioned about origin of universe.

George Gamow and Ralph Alpher introduced the big bang theory.

Big Bang Theory mentions that the age of nature is about 1370 crore years.

Edwin Hubble discovered that the nature is developing.

Fred Hoyle coined the term “Big Bang” for first time.

Milky Way is the galaxy in the Solar System.

According to Indian Mythology, Milky Way is called as Aakash Ganga. Milky Way is the spiral galaxy of star clusters.

Large Magellanic Cloud and Small Magellanic Cloud were the sub star clouds that located near to Milky Way.

The Andromeda Galaxy is a spiral galaxy and is the nearest galaxy of Milky Way.

The four 4 fundamental forces in nature is Gravitation, Electro Magnetism, strong interaction and weak force.

The nuclear force is the strongest force of nature.

The energy of the stars comes from nuclear fusion processes. Nuclear fusion is the process of conversion of large amount of Hydrogen gas to Helium through atomic nuclei collision at a very high speed.

The light of star is mainly represents its thermal energy.

Supernova is the explosion of a massive supergiant star.

A pulsar is a rotating neutron star which emits a beam of electromagnetic radiation.

The first pulsar was observed by Jocelyn Bell Burnell.  

Quasar (Quasi-stellar radio sources) is strong radio sources that are starlike. It emits massive amounts of energy. They have a crore times light than the sun.

Stellar-mass black holes are created when massive stars explode as supernova. They have at least 20 times heavier than Sun.

Even light cannot escape from Black Hole due to its strong gravitational force.

In 1939, Robert Oppenheimer scientifically explained Black Hole in 1939. John Wheeler first coined the term "black hole" in 1967. Stephen Hawking became popular through his theories about Black Hole. “A Brief History of Time” is his notable work.

The Indian Scientist who argued against Stephen Hawking’s Black Hole theories is Abhas Mitra. The stars including Sun become intermediate mass due to its gravitational force through burning. At this period, they become Red Giant.

Thanu Padmanabhan is the popular malayalee scientist who done research on Cosmology. “After the First Three Minutes” is his notable work.

Orion Arm is the name of location of Sun in Milky Way.

The Poland born, Nicolaus Copernicus is the first scientist to argue that Earth and other planets are surrounding the Earth.

Johannes Kepler is the author of “laws of planetary motion”.

Galileo Galilei is the father of modern astronomy.

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