Haumea, Makemake, Ceres are- Dwarf planet
The earth is closest (Perihelion) to the sun every year around – 3rd January
The approximate speed of the earth in its orbit around the Sun is – 30 km/s
The age of the earth is currently thought to be – 4.5 billion years
Number of satellites or moon does Uranus have – 27
The second largest planet in the solar system is – Saturn
The plate tectonics theory states that the Earth’s lithosphere is divided into- 7 major and 8 minor plates
Edmund Halley published “A Synopsis of the Astronomy of Comets” in – 1705
The most widely accepted model to explain the formation and evolution of the solar system is – Nebular hypothesis
➢ Terrestrial planets are made up of- Rocks and metals
➢ Mercury, Venus, Earth and Mars are- Terrestrial planets
➢ Jupiter, Saturn, Uranus, and Neptune are – Jovian planets
➢ The Universe is expanding, with galaxies moving away from each other is discovered by – Edwin Hubble
➢ ‘Great Red Spot’ is found on – Jupiter
➢ Largest planet in our solar system- Jupiter
➢ Hottest planet in our solar system- Venus
➢ Earth’s perihelion occurs in – January
➢ Smallest planet in our solar system- Mercury
➢ Total known moons of Neptune – 14
➢ Jupiter, Saturn, Uranus and Neptune are known as – Outer planets ( jovian planets)
➢ The constellation ‘Ursa Major’ is also known as – Great Bear
➢ Ursa Major, is the largest constellation in the – Northern Hemisphere
➢ Mercury, Venus, Earth and Mars are- Inner planets
➢ Inner planets are also called- “Terrestrial planets”
➢ The smallest outer planet is – Uranus
➢ Pluto is a – Dwarf planet
➢ Moon is only natural satellite of – Earth
➢ The radius of the earth increases from the poles to – Equator
➢ The light of the sun to reach the earth takes about – 8 minutes
➢ The distance between the earth and the sun is – 150 million km
➢ Mars has two moons- Phobos and Deimos
➢ Phobos and Deimos were discovered in1877 by – Asaph Hall
➢ The point of the Earth’s orbit that is nearest to the Sun – Perihelion
➢ The point of the Earth’s orbit that is farthest away from the Sun, is called- Aphelion
➢ The scientists who thought of the concept of the steady state of the universe – Fred Hoyle, Hermann Bondi and Thomas Gold
➢ Harold Jeffrey has made innumerable theoretical contributions to – Seismology
➢ He is renowned for determining that there are other galaxies in the Universe beyond the Milky Way – Edwin Hubble
➢ Scientist who revised the nebular hypothesis in 1796 – Pierre Laplace
➢ A celestial body that orbits the Sun, has roundish shape, has not cleared their Orbit of other debris, and is not a moon,called – Dwarf Planets
➢ Planets that do not have a natural satellite – Mercury and Venus
➢ Phobos and Deimos are the satellites of- Mars
➢ Venus (Earth’s Twin) is also known as- Morning Star
➢ Venus and Uranus rotates in- clockwise direction
➢ Planets that rotate in opposite direction(east to west) to that of other planets- Venus and Uranus
➢ Cosmic snowballs of frozen gases, rock and dust that orbit the Sun are known as- Comets
➢ Meteorites usually originate from the asteroid belt between – Mars and Jupiter
➢ The coldest planet in our solar system- Uranus
➢ The Kuiper Belt is a ring of icy rocks &dust bodies just outside the orbit of- Neptune
➢ Largest planet of our solar system is- Jupiter
➢ Time taken by moon to revolve around earth – 27.3 days
➢ The planet having shortest rotation period – Jupiter
➢ The Largest moon of Saturn is – Titan
➢ Europa is the moon of – Jupiter
➢ Smallest planet of our solar system- Mercury
➢ Radius of Earth is – 6371 km
➢ Orion constellation is also known as- Hunter
➢ The universe is also known as – Cosmos
➢ The International Space Station (ISS)completes an orbit around Earth in- 90-93 minutes
➢ Mars complete one spin on its axis in- 24.6 hours
➢ Satellite circles Earth directly above the equator in – Geostationary orbit
➢ The meteor shower named Quadrantids generally visible from Earth in- December/January
➢ Lyrids (meteor shower) can be seen from the earth in – April
➢ The constellation called the ‘Great bear ‘made up of – 7 Bright Stars
➢ The origin of the universe is explained by – Big Bang Theory
➢ The point in the orbit of the moon or satellite at which it is nearest to Earth- Perigee
➢ IC 1101 is a – Galaxy
➢ The approximate period between two consecutive new moons is – 29.5 days
➢ The radius of the Moon is – 1.74 × 106 m
➢ During the aphelion, distance between earth and the sun is- About 152 million km
➢ A planet which is made up of thick white and yellowish clouds of sulfuric acid-Venus
➢ The outer core of earth is responsible for- Earth’s magnetic field
➢ The process that moves, elevates or builds up portions of the earth’s crust is called – Diastrophism
➢ The process of wearing away the Earth’s surface by weathering and erosion is called – Denudation
➢ The bodies glowing in the night sky are known as – Celestial bodies
➢ Another name for Venus is – Lucifer
➢ Planetary scientists called the thin gaseous envelope around the Moon as- Lunar exosphere
➢ The Earth rotate about its own axis in one hour – 15 degree
➢ Saturn has two ocean moons named- Enceladus and Titan
➢ Glowing surface of the sun is known as- Photosphere
➢ The nearest Spiral galaxy to Milky way is- Andromeda galaxy
➢ The region where all of the light from the source is blocked is called – Umbra
➢ The distance of the Sun from the Earth is about – 8 light minutes
➢ He discovered in 1610 that Jupiter has four moons – Galileo Galilei
➢ The first to accurately describe the rings of Saturn as a disc around the planet in 1655 was – Christiaan Huygen
➢ He won the Nobel Prize in 1949 “for his prediction of the existence of mesons on the basis of theoretical work on nuclear forces” – Hideki Yukawa
➢ All changes in the weather of the earth are caused by – Sun
➢ Stars, Planets, and Moons are- Celestial bodies
➢ The concept of expanding universe was given by – Edwin Hubble
➢ He was well known as a pioneer in the field of exobiology (the study of the possibility of extraterrestrial life)- Carl Edward Sagan
➢ The size of the illuminated part of the moon visible from the Earth increases each day after – New moon day
➢ The sunlit part of the moon visible from the Earth decreases in size everyday – After Full moon day
➢ A dwarf planet which lies in the main asteroid belt – Ceres
➢ The radiation belts that are giant swaths of magnetically trapped highly energetic charged particles that surround Earth are known as – Van Allen radiation belts
➢ Charon is the natural satellite of – Pluto
➢ The famous constellations that can be seen during summertime in the early part of the night – Ursa Major
➢ Ceres, Pluto, Makemake, Haumea, and Eris are – dwarf planets
➢ The windiest planet in the solar system is- Neptune
➢ The fifteenth day from the full moon day is known as the – New moon day
➢ Sun and moon’s gravitational synergy induces Spring Tides on – Earth
➢ The balance of incoming and outgoing heat on Earth is – Heat Budget
➢ Mercury, Mars, Venus and Earth are- Terrestrial planets
➢ The word ‘comet’ comes from the ancient Greek word which means- long haired star
➢ Our solar system is a part of- Milky Way galaxy
➢ The lunar eclipse occurs on – Full moon
➢ The moon takes to complete a single rotation on its axis in – 27.3 earth days
➢ The ratio of the diameters of the moon and the earth is – 1 : 4
➢ Point of the Earth’s orbit that is farthest away from the Sun – Aphelion
➢ Point of the Earth’s orbit that is nearest to the Sun – Perihelion
➢ Aphelion occurs in early – July
➢ Perihelion Falls on – Early January
➢ Colour of a planet is determined by its- Surface temperature
➢ ‘The Great Bear’ is also known as- Saptarishi constellation
➢ Approximate Period between two consecutive new moons – 29.5 days
➢ Natural satellites of Mercury and Venus- Zero
➢ Solar eclipse occurs when the moon comes between – Earth and Sun
➢ Lo, Europa, Ganymede, and Callisto are some satellites of – Jupiter
➢ A cloud of dust and hydrogen is known as – Nebula
➢ Jupiter, Uranus, Saturn and Neptune are – Jovian planets
➢ Baily’s beads can be observed during a- Total Solar eclipse
➢ Weight of an object on the moon is equal to 1/6th of its weight on – Earth
➢ Only moon known to have its own internally generated magnetic field- Ganymede
➢ Largest natural satellite in our solar system – Ganymede
➢ Periodicity of Halley’s comet- 75-76 years
➢ Blood Moon is associated with- Lunar eclipse
➢ Smallest planet in our solar system- Mercury
➢ Largest planet in our solar system- Jupiter
➢ Orion, Saptarshi and Taurus are types of- Constellation
➢ Asteroid belt lies between- Mars and Jupiter
➢ Number of planets in our solar system- 8
➢ The planet in solar system whose atmosphere is made up of thick white and yellowish clouds of sulfuric acid- Venus
➢ Earth > Mercury > Venus > Mars >Neptune > Jupiter > Uranus > Saturn, is the decreasing order of- Density of planets
➢ In the universe, pulsars are- Rotating neutron stars
➢ The science of precisely measuring and understanding the Earth’s geometric shape, orientation in space, and gravity field is called – Geodesy
➢ The polar fleeing force is related to- Rotation of the earth
➢ The movement responsible for drifting of the continents was caused by the- Polar
fleeing force and tidal force
➢ The study of the universe is known as- Cosmology
➢ The small pieces of rocks which move around the sun are called – Meteoroids
➢ An equinox occurs when the position of the Sun is exactly over the – Equator
➢ Equinox falls on- 21 March and 23 September
➢ A pretty close cousin of Earth, also known as ‘Earth 2.0’ is – Kepler 452b
➢ The speed at which the Earth revolves around the Sun – 67000 miles per hour
➢ The Solar System is nearly- 5 billion years old
➢ Planet closest to Sun – Mercury
➢ The smallest dwarf planet in terms of radius is – Ceres
➢ Time taken by sunlight to reach Earth is- 8 min 20 sec
➢ Nearest star to the Earth – Sun
➢ After a full moon, the next 14 days mark the waning phase as the moon becomes-Thinner and fades
➢ Pole star indicates the direction to- North
➢ The illuminated side of the Moon facing the Sun and the night side facing Earth is- New moon
➢ Ursa Major appears in the early summer nights, which has a – bear shape
➢ The moon becomes invisible on the fifteenth day, counting from – Full Moon
➢ The reason for the formation of plasma in stars is – very high temperature
➢ Mars is called the – Roman god of war
➢ The mass of the Earth is – 5.97 ×1024 Kg
➢ India experience the shortest day of year on – 22 December
➢ Big Bang theory was propounded by- Georges Lemaitre
➢ 12 zodiac signs are mentioned in- Solar Calendar
➢ The range of temperature on the surface of the Moon with no atmosphere is from- (190°C to 110°C)
➢ The darkest, or least reflective object in the Solar System (with an albedo of 0.03)is – 1P/Halley (Comet)
➢ The moon completes one rotation on its axis as it completes one revolution around the – Earth
➢ Stars, Planets and Moon are- Celestial Objects
➢ Concept of expanding universe was discovered by – Edwin Hubble
➢ After new moon, size of the illuminated part of the Moon visible from Earth – Increases
➢ After a full moon, Size of the sunlight side of Moon as seen from Earth- Decreases
Leave a Comment