*The study of universe is known as Ans : Cosmology *The universe comprises of billions of Ans : Galaxies *The galaxies are made up of millions of Ans : Stars *Father of modern Astronomy Ans : Copernicus *The astronomer known as the Law Giver of Heavens Ans : Kepler *Light year and parsec are the units of measuring distances in the Ans : Universe *The distance travelled by light in one year is called Ans : One light year *One light year = 9.46 x 1012 kilometers *An astronomical unit of distance Ans : Parsec *One parsec = 3.26 light year *Scientist who found universe is expanding, in 1929 Ans : Sir Edwin Hubble *Geocentric theory was propounded (the Earth was the centre of universe) by Ans : Ptolemy *Heliocentric theory was propounded (the Sun is the centre of the universe) by Ans : Copernicus *Laws of Planetary motion was discovered by Ans : Kepler *Study of celestial bodies and universe Ans : Astronomy *Study of the structure of the universe Ans : Cosmology *Study of the origin of universe Ans : Cosmogony *Study of life in outer space Ans : Exobiology *Study of moon Ans : Selenology *Study of Space Craft Ans : Astronautics *Study of Sun Ans : Heliology *International Astronomical year was observed by UNO in Ans : 2009 *Father of Indian astronomy Ans : Aryabhattan *Father of Scientific astronomy Ans : Kepler *Father of modern Indian astronomy Ans : M.K.Vainu Bappu *Farther of Indian Space Programme Ans : Vikram Sarabhai
EVOLUTION OF UNIVERSE
*There are three main theories put forward to explain origin and evolution of universe.
1.BIG BANG THEORY
*Most widely accepted theory regarding the origin of universe Ans : Big Bang Theory *Big Bang Theory was proposed by Ans : George Lemaitre *Big Bang Theory was modified by Ans : Edwin Hubble *The term big bang was coined by Ans : Fred Hoyle *Big bang theory is also called as Ans : Expanding Universe Hypothesis
2. STEADY STATE THEORY
*Steady State Theory was proposed by Ans : Hermann Bondi, Thomas Gold and Fred Hoyle *Steady State Theory was proposed in Ans : 1948 *Quasi Steady State Theory was proposed by Ans : Jayant Narlikar
3.THE PULSATING THEORY
The Pulsating Theory was proposed by Ans : Dr. Allan Sandage *The theory which proposed that at present universe is expanding Ans : Pulsating Theory
GALAXIES
*A galaxy is a vast collection of billions of stars, dust, gas and empty space held together by Ans : Gravitational force *The word galaxy was first introduced by Ans : William Herschel *First person to calculate distance between galaxies Ans : Sir Edwin Hubble *There are about 5Q billion galaxies exist in the universe *Group of galaxies is known as Ans : Cluster *The most distant object visible to naked eye in the universe Ans : Andromeda Galaxy *Our sun and its planets belongs to the Ans : Milky Way Galaxy or Akash Ganga *First astronomer to demonstrate the existence of galaxies beyond milky way Ans : Edwin Hubble (1924)
TYPES OF GALAXIES
1.Spiral Galaxies 2.Elliptical Galaxies 3.Irregular Galaxies *The galaxy having central nucleus with great spiral arms Ans : Spiral Galaxy *Milky way and Andromeda are the examples of Ans : Spiral Galaxies *New stars are formed in Spiral Galaxies Largest spiral galaxy Ans : Andromeda Galaxy *The farthest object which can be seen with naked eyes Ans : Andromeda Galaxy *The milky way belongs to a cluster of galaxies called Ans : Local group *The galaxies having no spiral arms are called Ans : Elliptical,Galaxies *Red Giants and white dwarfs are seen in the Ans : Elliptical Galaxies *Dim collection of old stars are seen in the Ans : Elliptical Galaxies *Galaxies having no regular shape Ans : Irregular Galaxies *Large Magellanic cloud is an Ans : Irregular Galaxy
BOOKS AND AUTHORS
*Means, Hermes Ans : Eratosthenes *Almagest, The Geography Ans : Ptolemy *On the Revolution of Celestial Bodies Ans : Copernicus *Harmonies of the World Ans : Kepler *Philosophiae Naturalis Principia Mathematica Ans : Newton *Aryabhatiyam, Suryasidhanthika Ans : Aryabhatta
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
SOLAR SYSTEM
*The group of sun, 8 planets, their moon and other non stellar objects is called Ans : Solar System *Solar system was identified for the first time by Ans : Copernicus *The centre of solar system Ans : Sun *All planets revolve around the sun in Ans : Elliptical orbit *Distances in solar system are expressed in Ans : Astronomical Unit *The mean distance between Earth and Sun is called Ans : Astronomical Unit *One Astronomical unit is equal to Ans : 15 crore Km *Our solar system is in the outskirts of the Ans : Milky way galaxy *The theory related with the evolution of Solar System Ans : Nebular theory *The Nebular theory was proposed by (in 1796) Ans : Pierre - De Laplace *The solar system moves with an average speed of Ans : 250km/second *The solar system takes 250 million years to complete one revolution around the Ans : Galactic centre *The period taken by the solar system to complete one revolution around the Galactic centre is known as Ans : Galactic year or Cosmic year *First man made space craft which passed beyond the solar system Ans : Voyager I *First space probe to study about the outer solar system Ans : Voyager I *Voyager I was launched by Ans : NASA *Voyager I was launched on Ans : September 5,1977 *The farthest space craft from the sun Ans : Voyager 1 *Farthest man made object Ans : Voyager I
THE SUN
*The sun is a star *The nearest star to the star Ans : Sun *The major source of energy of the solar system Ans : Sun *The energy in the solar system is provided by nuclear fusion, that converts Ans : Hydrogen into helium *The sun is mainly composed of Ans : Hydrogen *The minor spiral arm of the Milky Way where sun is located is called Ans : Orion Arm *The sun is a medium sized yellow star that is about Ans : 15 crore km (1 Astronomical Unit) away from the Earth *When the Earth gets closest to the sun is called Ans : Perihelion *Perihelion day Ans : Around January 3 *When the Earth gets farthest from the sun is called Ans : Aphelion *Aphelion day Ans : Around July 4 *Sun is made up of about Ans : 2x10^30 kg of gas *The amount of Hydrogen in the sun Ans : 71% *The amount of Helium in the sun Ans : 26.5% *The amount of other gases Ans : 2.5% *The temperature of sun's core is about Ans : 1.25crore°C *Surface temperature of sun is about Ans : 5500°C *The heat and light from the sun come to earth by the means of Ans : Radiation *The time taken by sunlight to reach the earth Ans : 8 minutes 20 seconds (500sec) *The age of sun Ans : 460 crore years *The surface of the sun we see from earth is called Ans : Photosphere (Temperature about 5500°C) *Photosphere emits light at Ans : Visible wavelength *Chromosphere is a small region lies above the Ans : Photosphere *Chromosphere appears red because of the existence of Ans : Hydrogen atoms *Chromosphere is visible during Ans : Solar eclipses *The outermost layer of the Sun Ans : Corona *The corona cannot be seen with the naked eye except during a Ans : Total solar eclipse *Comparative cool regions of sun is called Ans : Sun spots *Sun spot was observed through telescope for the first time by Ans : Galileo *The continuous flow of charged particles from the sun which permeates the solar system is called Ans : Solar wind *Solar wind occurs once in Ans : 11 years *A sudden flash of brightness observed near the sun's surface Ans : Solar flare *ISRO's solar mission to study about sun's corona Ans : Adithya
ESCAPE VELOCITY
*Escape velocity of sun - 61&5km/s *Escape velocity of earth - 11.2 km/s *Escape velocity of moon - 2.4 km/s *Escape velocity of Jupiter- 59.5 km/s
PLANETS
*The solid heavenly bodies which revolve round the sun in closed elliptical path Ans : Planets *Number of planets in the solar system Ans : 8 *When a Planet comes between the Sun and the Earth. It is called Ans : Transit
THE SEQUENCE OF PLANETS ACCORDING TO THEIR SIZE (IN DESCENDING ORDER)
*Inner planets are otherwise called as Ans :Terrestrial or Rock Planets *Inner Planets are nearer to the Ans : Sun *Inner Planets have very few natural satellites or no satellites *Inner Planets have higher Ans : Densities *The largest of inner planet Ans : Earth
OUTER PLANETS
*Jupiter *Saturn *Uranus *Neptune *Outer planets are called Ans : Jovian planet or gaseous planets *Outer planets have large number of satellites *The planets having ring system Ans : Outer Planet *Smallest Planet-Mercury *Nearest planet to the sun - Mercury *Planet with lowest escape - velocity *Mercury - Mercury *Speedy Messenger - Mercury *Planet with least gravitational Pull - Venus *Brightest planet - Venus *Hottest planet - Venus *Pet of sun - Venus *Morning star -Venus *Evening star- Venus *Nearest planet to earth - Venus *Slowest Rotating planet - Venus *Earth's Twin - Venus *Planet with longest day - Venus *Blue planet-Earth *Planet with highest density - Earth *Red Planet - Mars *Biggest planet - Jupiter *Planet with strongest gravitational pull -Jupiter *Planet with maximum number of satellites -Jupiter *Fastest rotating planet- Jupiter *Planet with shortest day- Jupiter *Planet with highest escape velocity *Planet with highest weight - Jupiter *Golden Giant - Jupiter *Planet with lowest density - Saturn *Planet with lowest weight - Saturn *Green planet - Saturn *Rolling planet - Uranus *Lying planet - Uranus *Father Sky - Uranus *Coldest planet - Neptune *Farthest planet - Neptune *Windy planet - Neptune *Planet with slowest revolution - Neptune *Biggest satellite Ans : Ganymede (Jupiter's satellite) *Only satellite with an atmosphere like earth Ans : Titan (Saturn's satellite)
DWARF PLANETS
*A celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as planets Ans : Dwarf Planets *Number of dwarf planets known in the Solar System Ans : 5 *Five Dwarf Planets are Ans : Pluto, Ceres, Eris, Makemake and Haumea *Pluto and Eris are known as Ans:Plutoid
ERIS
*The largest Dwarf Planet Ans : Eris *The Greek Goddess of strife and discord Ans : Eris *Eris was discovered by Ans : Mike Brown (2005) *Eris was initially named Ans : 2003 UB 313 *The discovery of Eris caused the demotion of Pluto, as it is larger than Pluto *Eris was also called Ans : Xena *Eris has a small satellite named Ans : Dysnomla
PLUTO
*Pluto is named after God of underworld in anicent Ans : Roman mythology *Pluto was discovered by Ans : Clyde Tombaugh (1930) *The ninth Planet in the Solar system was Ans : Pluto *International Astronomical Union classified Pluto as a dwarf planet on Ans:August 24, 2006, at Prague *The second largest dwarf planet Ans : Pluto *Five satellites of Pluto are Ans : Charon, Nix, Hydra, Styx and Kerberos *Largest satellite of Pluto is Ans : Charon *Charon was discovered by Ans : James Christy (1978) *Pluto's orbit lies nearer to the planet Ans : Neptune *Time taken by Pluto to revolve around the sun Ans : 248 years *Rotation period of Pluto Ans : 6.4 days *A spacecraft to Pluto named 'New horizon' was launched in Ans : 2006 *New horizon' was launched by Ans : NASA *The source of energy used by New Horizon Ans : Plutonium
CERES
*Ceres was the largest asteroid in our Solar System *Ceres was promoted as a dwarf planet in Ans : 2006 by IAU *The smallest dwarf planet Ans : Ceres *Solar eclipse is held on a Ans : New moon day *In solar eclipse,moon comes between Ans : Earth & Sun (EMS) *First person to predict the solar eclipse Ans : Thales *Lunar eclipse is held on a Ans : Full moon day *In Lunar eclipse earth comes between Moon & Sun (MES) *The Roman Goddess of the harvest and motherly love Ans : Ceres *The only dwarf planet in the inner solar system Ans:Ceres *Time taken by Ceres to revolve around the sun Ans : 46 years *Ceres was discovered by Ans : Giuseppe Piazzi in 1801 *Spacecraft launched by NASA to Ceres Ans : Dawn (2007)
COMETS
*A celestial body moving about the sun, usually in a highly eccentric orbit Ans : Comet *Comets are also called Ans : Dirty snowballs or mud balls *The biggest comet Ans : Centuary 2060 Chiron *Comet Shoemaker - Levy 9 was discovered by Ans : Eugene and Carolyn Shoemaker and David Levy in 1993 *The comet which hit the planet Jupiter in 1994 Ans : Comet Shoemaker - Levy 9 *The huge comet heading on a collision course with earth on August 17, 2116 Ans : Swift-Tuttle *First space Shuttle to visit a Comet (comet Tempel 1) is Ans : Deep Impact (America)
HALLEY'S COMET
*First people to observe Halley's Comet Ans : Chinese *The orbital period of Halley's Comet was calculated by Ans : Edmond Halley *Halley's Comet is seen once in every Ans : 76 years *Halley's Comet was last seen in Ans : 1986 *Halley's Comet will next appear in Ans : 2062 *'A synopsis of the Astronomy of Comets' was published in 1705 by Ans : Edmond Halley
ASTEROIDS
*Asteroids are planet like irregular objects mostly seen between the orbits of Ans : Mars and Jupiter *Asteroids are also known as Ans : Planetoids or minor planets *The name 'Asteroid' was first used by Ans : William Herschel *First discovered asteroid Ans : Ceres (1801) *The largest asteroid in the solar system Ans : 4 Vesta *First space shuttle reached on Asteroid Ans : NEAR Shoemaker (Feb 12, 2001) *Asteroid expected to collide on earth in 2022 Ans : 19BF 19 *Japan's space shuttle ' Hayasabha 1' reached Asteroid Ans : Itokawa (2005) *'Hayabusa2' is an Asteroid project launched by Ans : Japan in 2014 *Project aimed to study about the asteroids CERES and VESTA Ans : DON
METEORS AND METEORITES
*A bright streak of light in the sky Ans : Meteor *A meteor is other wise known as Ans : Shooting star or falling star *Small rocky or metallic body in outer space which are significantly smaller than asteroids Ans : Meteoroids *Bright meteors are called Ans : Fireballs *The phenomenon in which many meteors fall through the atmosphere in a relatively short time Ans : A meteor shower *Largest Meteor entered the earth Ans : Heba west (in 1920 Namibia) *Meteor entered the earth in 1999 Ans : Leonid Shower
1. MERCURY
*Period of Revolution- 88 days *Period of Rotation - 58 days *Escape Velocity - 4.3 km/sec *Diameter - 4880km *According to Greek myth, the God of commerce and Travel is Ans : Mercury *The Planet known as Roman God of Messenger Ans : Mercury *The smallest planet Ans : Mercury *Planet which has least escape velocity in the solar system Ans : Mercury *Planet nearest to the sun Ans : Mercury *The planet which is known as Will -O- the -Wisp Ans : Mercury *Mercury has no atmosphere due to Ans : Low escape velocity and high temperature *Fastest revolving planet (88 days) Ans : Mercury *Second hottest planet in the solar system Ans : Mercury *The distance between Sun and Mercury Ans : 6 crore km *Mercury has no known satellites *The planet that has the shortest year Ans : Mercury *Planet which has a silicated coating layer Ans : Mercury *Mercury has no storm due to the lack of atmosphere *In Mercury, the day is highly hottest and the night is Ans : Highly coldest *Mercury has been visited by two spacecrafts 1.Mariner 10 (1973 USA) 2.Messenger (2004 NASA)
2.VENUS
*Period of Revolution - 224.7days *Period of Rotation - 243 days *Escapes Velocity - 1036km/s *Diameter - 12,104 km *Planet named after Roman Goddess of love beauty and spring Ans : Venus *The only planet to take more time for rotation than revolution Ans : Venus *The planet which experiences the 'longest day' among planets Ans : Venus *The only planet which rotates from east to west Ans : Venus *The planet in which the sun appears to rise in the west and set in the east Ans : Venus *The planet which is known as 'pet of the sun' Ans : Venus *The Planet's orbit which is the most nearly circular of that of any planet Ans : Venus *The planet which is the second brightest object in the night sky after moon Ans : Venus *The planet which is called as the Morningstar and the Evening star Venus *First person to identify that the morning star and the evening star was the same object Ans : Pythagoras *The planet which is known as the Twin earth Ans : Venus *The Nearest planet to see without telescope Ans : Venus *The nearest planet to the earth Ans : Venus *The atmosphere of the planet which contains traces of sulphuric acid (H2S04) Ans : Venus *The hottest planet in the solar system Ans : Venus *The planet sometimes known as Lucifer Ans : Venus *The most mysterious planet Ans : Venus *The largest and high plateau found in Venus is known as Ans : Lakshmi Planum *The highest mountain in Venus Ans : Maxwell montes (In memory of James Clark Maxwell) *First space craft landed on Venus Ans : Venera - 7 (Soviet Union) *First space craft sent to Venus in 1962 Ans : Mariner -2 (NASA) *First US orbiter to map the surface of Venus by using Radar Ans : Magellan
3. EARTH
*Distance from the sun : 150 million km *Period of Revolution : 365 days hrs 48 min 45 sec *Period of Rotation : 23 hrs 56 min 4 sec *Escape Velocity : 11.2 km/sec *Diameter : 12,756 km *Polar diameter : 12713 km *Age : 4.6 billion years old *Third planet from Sun Ans : Earth *Fifth largest planet in the solar system Ans : Earth *Largest Inner planet Ans : Earth *The only planet in the solar system where life can exist Ans : Earth *The densest among the planets Ans : Earth *The planet known as 'Blue planet' Ans : Earth *The only planet whose English Name is not derived from Greek/Roman mythology Ans : Earth *Element having the name of Earth Ans : Tellurium *Average temperature of the Earth's atmosphere Ans : 14°C *The only planet on which water can exist in liquid form on the surface Ans : Earth *Earth's atmosphere consists of Ans : 78% nitrogen, 21% oxygen, 0.93% of Argon and 0.038% carbon dioxide *The only one natural satellite of Earth Ans : Moon *Nearest star to the Earth Ans : Sun *The closest cosmic neighbour of earth Ans : Moon *The shape of earth is known as Ans : Oblate Spheroid (Geoide) *Earth day is observed on Ans : April 22 *The hottest place recorded on earth Ans : El Azizia (57.7°C) *The coldest place recorded on Earth - Ans : Vostok station (Antartica "89°C) *The planet which is known as Gaiyya in Greek Ans : Earth
4. MARS
*Period of Revolution : 687 days *Period of Rotation : 24 hrs, 37 minutes 22.63 sec *Escape Velocity : 5.027 km/s *The planet which is named after the Roman God of War Ans : Mars *The planet which is called as Red planet Ans : Mars *Phobos and Deimos are the two satellites of Ans : Mar *The red colour of Mars is due to the presence of Ans : Iron oxides *The planet known as fossil planet and Rusty planet Ans : Mars *The satellite known as Black moon Ans : Phobos *Smallest satellite in our solar system Ans : Deimos *Phobos and Deimos were discovered by Ans : Asaph Hall (1877) *Colombia Memorial station and Carl Sagan Memorial station are in Ans : Mars *The highest volcanic mountain in Mars Ans : Olympus mons *The biggest Canyon found in Mars Ans : Valles Marineris *The atmosphere of the planet which contains the huge amount of Carbon dioxide Ans : Mars *First space craft to visit Mars Ans : Mariner 4 (1965) *First space craft to land on mars was Ans : Viking - I (1975 NASA) *NASA's Path Finder landed successfully on Mars in Ans : 1997 *In January 2004, NASA's Mars exploration rovers named Spirit and Opportunity landed on Ans : Mars *The first robot to travel on the Mars surface Ans : Sojourner
MARS ORBITER MISSION
*India's first Mars mission Ans : Mars Orbiter Mission (MOM) *Mars Orbiter Mission is commonly known as Ans : Mangalyaan *India's first interplanetary mission Ans : Mangalyaan *Mangalyaan was launched on Ans : November 5, 2013 *Mangalyaan was launched from Ans : Sriharikota *Mangalyaan reached at the orbit of Mars on Ans : September 24, 2014 *The vehicle launched Mangalyaan into Mars orbit Ans : PSLV C-25 *Director of Mangalyaan Mission Ans : P.Kunhikrishnan *Project Director of Mangalyaan Ans : S.Arunan *Programme Director of Mangalyaan Ans : M.Annadurai *ISRO Chairman at the time of the launching of Mangalyaan Ans : K.Radhakrishnan *Major instruments in Mangalyaan Ans : Methane Sensor, LAP (Lyman Alpha Photometer) *Total cost of Mangalyaan Mission Ans : 450 crores *First Asian country to launch a space craft to Mars Ans : India (4th Nation in the world) *Other countries to launch space crafts to Mars Ans : Russia, USA, European Union *First nation in the world to launch a Space Craft to Mars successfully in its first attempt Ans : India
MAVEN
*MAVEN is Mars mission of Ans : NASA *MAVEN Ans : Mars Atmosphere and Volatile Evolution Mission *MAVEN was launched on Ans : Nov 18, 2013 *MAVEN arrived at Mars orbit on Ans : September 22, 2014 *Launch vehicle Ans : Atlas V 401
CURIOSITY
*Curiosity was an exploration to Ans : Mars *Curiosity was launched by Ans : NASA *Curiosity was launched on Ans : November 26, 2011 *Landing date of Curiosity Ans : August 6,2012 *The crater in which the Curiosity landed Ans : Gale crater *Launch vehicle Ans : Atlas V 541
5.JUPITER
*Period of Revolution : 12 years *Period of Rotation : 9 hrs, 50 min, 30 sec *Escape Velocity : 59.5km/sec *Largest planet in the Solar System Ans : Jupiter *In Indian mythology Jupiter is known as Ans : Brihaspathy *Fastest rotating planet Ans : Jupiter *The planet experiences the shortest day and Night Ans : Jupiter *In Greek mythology, the Ruler of Gods and men Ans : Jupiter *Jupiter is known as Ans : Jovian planet *The fourth brightest object in the sky after the sun, the moon and the Venus Ans : Jupiter *The planet known as fluid planet Ans : Jupiter *The planet with highest gravitational force Ans : Jupiter *The planet with the highest Escape Velocity Ans : Jupiter *On Jupiter objects experience more Ans : Weight *Jupiter has the continuous presence of Ans : Radio Active Rays *The planet with a great Red spot, big enough to hold two earths Ans : Jupiter *The great Red spot in Jupiter was discovered by Ans : Robert Hook (1664) *Jupiter and its Satellites are called Ans : Mini Solar System *The planet with the most number of satellites Ans : Jupiter *Out of the 67 satellites of Jupiter, four satellites were discovered by Ans : Galileo *The four large satellites of Jupiter are known as Ans : Galilean Satellites They are : 1.Ganymede : The largest satellite in the Solar System 2.IO : Known to have numerous active volcanic mountains 3.Callisto : The 3rd largest satellite 4.Europa:Has the presence of a vast ocean covered Ice *The inner most outer planet Ans : Jupiter *In 1994, Comet Shoemaker - Lavey 9 Collided with Ans : Jupiter *Space Craft sent by NASA to study Jupiter Ans : Galileo (1989) *Juno mission is launched by NASA to study Ans : Jupiter
NAME OF SPOT
FOUND IN
*Great Red Spot - Jupiter *Little Red Spot - Jupiter *Great Dark Spot - Neptune *Great White Spot - Saturn
6.SATURN
*Period of Revolution : 30yrs *Period of Rotation : 10 hrs 14 min *Second largest planet in the Solar System Ans : Saturn *The God of agriculture in Roman Mythology Ans : Saturn *Farthest planet to be seen with naked eyes Ans : Saturn *The planet with least density Ans : Saturn *The only planet having less density than water Ans : Saturn *The planet having second highest number of satellites Ans : Saturn *Planet having more attractive 7 rings around it Ans : Saturn *The Rings of Saturn were discovered by Ans : Galileo *Planet known as Golden giant Ans : Saturn *The only planet having black rain Ans : Saturn *Super Wind and Dragon storm are found Ans : Saturn *Number of satellites to Saturn Ans : Around 62 *A joint project of NASA and European space Agency launched in 1997 to study the planet Saturn Ans : Cassini - Huygens Mission *Phoebe, Tethys and Mimas etc. are the satellites of Ans : Saturn *Largest Satellite of Saturn Ans : Titan *Titan was discovered by Ans : Christiaan Huygens (1655) *The only satellite in the solar system having atmosphere of its own Ans : Titan *Second largest satellite after Ganymede Ans : Titan *The satellite known as the past of the Earth Ans : Titan *The satellite of Saturn known as Death star Ans : Mimas
7.URANUS
*Period of Revolution : 84 Years *Period of Revolution : 17 hrs 12 min *Third largest planet in the Solar system Ans : Uranus *Uranus was discovered by Ans : William Herschel (1781) *First planet which was discovered with the help of Telescope Ans : Uranus *The planet knows as Rolling or Lying planet Ans : Uranus *The planet appears as a Green planet Ans : Uranus *Shakespesrian character names are given to the satellites of Ans : Uranus *Uranus has 27 known satellites *Largest satellite of Uranus Ans : Titania
MAJOR SATELLITES OF URANUS:
*Prospero *Sycorax *Stephano *Desdemona *Cupid *Juliet *Puck *Portia *Miranda *Caliban *Titania *Umbrid *Ariel *Oberon *Miranda *Uranus is seen in green blue colour due to the presence of Ans : Methane *Sky God of Greek mythology Ans : Uranus *Second least density planet after Saturn Ans : Uranus
8. NEPTUNE
*Period of Revolution : 165 years *Period of Rotation : 16 hrs,6 mins *8th and the farthest planet in the solar system Ans : Neptune *Fourth largest planet Ans : Neptune *In Roman mythology, the God of the Sea Ans:Neptune *Neptune was discovered by Ans : Johann Galle (German) in 1846 *The atmosphere of Neptune is visible in Ans : Blue colour *Liberty, equality, and Fraternity are the rings of Ans : Neptune *High storm area in Neptune is known as Ans : Wizard eye Neptune *Atmosphere of Neptune contains poisonous gases like Ans : Methane, ammonia etc. *Largest satellite of Neptune Ans : Triton *Neptune has been visited by only one space craft Ans : Voyager -2 in 1989
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