03-01-2018, 04:29 PM
PSLV
*The launch vehicle of ISRO, which created history by launching a record of 104 satellites in a single mission
Ans : PSLV - C37
*PSLV - C37 was launched on - 15th February 2017 (from Satish Dhawan Space Centre)
*By this launch India overcame the previous record of Russia with 37 launch in a single mission.
*The previous record of ISRO was 20 satellites in a single launch on 22nd June 2016 (PSLV-C34)
*Number of Indian satellites that was launched by PSLV - C37 - 3 (Cartosat, 2, INS 1 A, INS-IB). And all the remaining 101 nano-satellites were from foreign customers.
America - 96 Kazakhstan - 1
Switzerland -1 Israel -1
Netherlands - 1 U.A.E-1
*The project director of PSLV - C37 - B. Jayakumar
*Malayali scientist who took a major role in PSLV - C37 mission
Ans : Subha Warrier
*The Chairman of ISRO at the time of PSLV - C37 launch
Ans : A.S. Kiran Kumar
*The study of celestial bodies and the universe)
Ans : Astronomy
*Father of modern Astronomy
Ans : Copernicus
*Heliocentric theory was put forward by
Ans : Nicolaus Copernicus
*Solar system was discovered by
Ans : Nicolaus Copernicus
*Geocentric Theory of Earth was put forward by
Ans : Cladius Ptolemy (Astronomer&Astrologer)
*The first person to calculate the circumference of the Earth
Ans : Eratosthenes (Astronomer and Geographer)
*The line used to define the boundary between the Earth’s atmosphere and outer space Karman Line (Line named after Theodore- Von-Karman)
*The astronomist known as ‘Law giver of the heavens’
Ans : Johannes Kepler
*The laws of planetary motion are discovered by
Ans : Johannes Kepler
*Chandrasekhar limit is a limiting mass below which a star becomes a white dwarf Chandrasekhar limit = 1.4 times the mass of the sun.
*Kepler discovered that planets travel in orbits which are elliptical.
Galaxies
*A galaxy is a group of millions of stars.
*The word‘Galaxy’was derived from the greek word
Ans : Galaxias (Meaning - Milky circle)
*The word ‘Galaxy’ was first used by
Ans : William Hershel
*Solar system is included in the galaxy
Ans : Milky way
*The number of stars in the milky way galaxy is known as
Ans : Constellation
*The largest constellation in the milky way
Ans : Hydra
*Smallest constellation in the milky way
Ans : Crur
*The attractive force by which galaxies are held together
Ans : Gravitational force
*The star nearest to the earth
Ans : Sun
*The star nearest to the sun
Ans : Proxima centauri (It is a Red dwarf)
*The biggest star in the milky way.
Ans : U Y Scuti
*The brightest star in the night sky
Ans : Sirius (Dog star)
*The brightness of the stars indicates its
Ans : Temperature
Book & Authors
*‘Almagest’ - Ptolemy
*Geography, Hermes
Ans : Eratosthenes
*The Universe in a Nutshell Black Holes and Baby Universes, A brief History of Time, My Brief History
Ans : Stephen Hawking
*Aryabhativa,Arya Sidharta
Ans : Aryabhatta
*Harmonies of the Worlds
Ans : Johnnes Kepler
*Pancha Siddhantika
Ans : Varahamihira
UNIVERSE
The universe is an endless space having number of galaxies,stars,nebulae and other celestical bodies.
Ans : Theories of origin of universe
Big Bang
*The Big Bang theory is the most widely accepted theory regarding the origin of the universe.
*According to this theory, the universe originated from a tiny hot body with a giant explosion and it expanded rapidly. This rapid expansion caused the universe to cool and resulted in its present stage.
*Still it is expanding
*The Big Bang occurred approximately 13.75 billion years ago.
*The Big Bang Theory is also called as the expanding universe hypothesis. It was origmdly proposedby George Lemaitre, but George Gamow, Ralph Alpher and Hans Bethe’s also proposed the theory. It was modified by Edwin Hubble and others.
The Steady State theory
*he Steady State theory was developed by Fred Hoyle, Thomas Gold and Hermann Bondi in 1948.
*It is an alternative to the Big Bang theory
*According to the Steady State theory new matter is being continuously created as the universe expands. It also asserts that although the universe is expanding, it nevertheless does not change its appearance over time.
*It has no beginning and no end.
*Quasi Steady State theory was proposed by Jayant. V Narlikar, Fred Hoyle and Geoffrey Burbidge
The Pulsating theory
*According to this theory, the expansion of the universe may stop by the gravitational
*The alternate expansion and contraction of the universe give rise to pulsating.
*Dr. Allan Sandage proposed this theory.
Various Studies
*The study of the structure of the universe
Ans : Cosmology
*The study of life in outer space
Ans : Exobiology
*The study of Moon
Ans : Selenology
*The study of space crafts
Ans : Astronautics
*The study of chemical composition and physical propertices of celestial bodies
Ans : Astrophysics
