IMPORTANT INFORMATION ABOUT UNIVERSE
Cheron is the moon of Pluto
Total number of satellites are 31 (chk: 50)
Blue color of sky is due to Tyndal Effect
Our solar system contains 50 satelites
Total planets in solar system are 8
Distance of sun from earth is 150 million km = 1 a.u (angstrom unit)
Moon from earth is 385,000 km
Outer surface of sum is called photosphere
Sun has 90% hydrogen, 8% helium and 2% other elements.
Temperature at surface of sun is 6000K and at its center 20 million K
Venus reflects highest percentage of light
Morning star is called to Venus.
Venus is the only planet that rotates clockwise
Rhea is the fifth natural satellite of Saturn.
Speed of earth in orbit around sun is 8.5 miles per second.
The only planet which rotates on its axis from East to West is Uranus
Uranus is called lopsided planet
Uranus contain atmosphere of Hydrogen and Helium
Period of rotation of earth on axis is 1 day or 23 hrs, 56 minutes & 4.09 seconds.
Period of revolution of Earth around Sun is 356 days, 6 hrs, 9 minutes & 9.54 seconds.
Volume of Earth is 260 billion cubic miles.
Weight of earth is 6586x10 power 18 tons
Rings of Saturn were discovered by Galileo in 1610
Titan, the largest moon in solar system is of Saturn
Triton is a satellite of Neptune
Planet referred as Morning Star and Evening Star is Venus
Venus’ atmosphere is 90 times thicker than earth’s.
The temperature of Venus’ surface is about 430 deg: C
Biggest Comet known to man is kohoutek
Only planet whose day is longer than its year is Venus
Brightest visible star is Sirus
Star nearest to earth is Sun
Atmosphere of sun has 3 layers
Sun spots are the cooler areas of sun
In 28 days moon returns to the same position in its orbit
The light coming from stars give the idea of their temperature.
A light year is equal to 9.46 trillion km
Sun radiated energy equal to 10 trillion of TNT explosion
Mercury is nearest to the sun, smallest and fastest planet, with shortest rotation time. Moon = 0
Venus is the brightest, hottest, closest to earth and earth’s twin in size and mass, has largest quantity of CO2 Moon = 0
Earth is most dense, watery, bios planet. Moon = 1
This is an instrument used for measuring the altitude of a celestial body: sextant
Mars moon = 2- Phobos and Deimos
Mars is named after the Roman god of war.
Mars is called Red planet
Mars is half the size of earth
Europa is a moon of Mars
Mars contain atmosphere of carbondioxide
Jupiter is largest, with largest number of satellites, smallest day, with a red spot. Moon = 63
Jupiter is 11(or 10) times larger than earth
Europa is the moon of Jupiter.
CHIIRON is the larges comet in the universe.
Solar eclipse occurs at new moon
Sun is 400 times larger than moon
Lunar eclipse occurs at full moon.
Halos around the moon are formed because of the phenomenon of ___ (optical phenomena)
Jupiter is the fastest planet of the solar system
The Asteroid Belt is found between which of the following planets? Mars and Jupiter
The visible part of the Sun is called Photosphere
Corona is the outer most halo of the Sun.
Mercury and Venus are without Satellites.
The largest crater on the surface of moon is called to Bailly.
The earth is calculated to b 4540 million years old.
A ‘shooting star’ is a meteor.
At 7050 km per hour, Sun rotate on its axis.
510 million square kilometers is the total surface area of the earth.
The northern polar lights are called Aurorae Borealis, and southern polar lights are called Aurorae Australis.
The pulsating universe theory explains the evolution of universe.
760 miles/hr is the speed of sound.
1480, 00,000 km is the distance from sun to earth.
Temperature of Sun is 6000 degree C.
Saturn is least dense moon = 56
Saturn is the second largest planet.
Planet with maximum number of moons is Saturn
Planet with ring is Saturn
Uranus moon = 12, Uranus gives greenish glow
Neptune is the coldest, slowest, largest year moon = 8
Rank of earth as per size is Fifth
Revolution period of earth is 365.25 days
In a leap year there are 29 days in Febrary
Earth is older than moon
Sun light takes 8.3 min to reach earth or 510 seconds
Time required to moon light to reach earth is 1.3 seconds
Light can circle earth 7 times in a________.
Sun is 109 times bigger than earth.
Light travels fastest in vaccum
Rhea is the fifth natural satellite of saturn
Coldest, smallest and farthest planet Neptune
Asteroids are small planets revolving round the sun
Sun is the brightest star in the universe
A shooting star is called a meteor
Our galaxy is spiral known as Milky Way
Shape of our milky way is spiral
The milky way extends through the distance of 10 power 5 light years
Super Nova is a dying star
Nearest spiral galaxy to Milky Way is Andromeda galaxy
Nearest start to our sun is Alpha Centauri
Biggest star in our galaxy is Proxima Centauri
A collection of galaxies is called cluster
.moon is 81 times lighter than earth
Moon has 7% reflection as compared to earth (i.e poor reflection)
Moon has 1/6th gravitation as that of earth
Moon’s 59% surface is visible from earth
Mass of moon is 1/8th to that of the earth
Moon has no atmosphere
Sun is closer to earth in January
At perihelion, earth is nearest tosun
Earth’s axis is inclined at an angle of 66 ½ deg: to the plane of its orbit around the sun or the axis is inclined at 23 ½ deg: from the vertical
Soros cycle is the largest interval between two total solar eclipses about 18 years
Sun has 27 day rotation period
Moon’s rotation period is equal to the Earth’s
Rotation period of earth is 23hrs, 56min, 4sec
Earth rotates around on axis pointing towards the Polar Star
Revolution period is 365 ¼ days = 365.25 days, ¼ is added for leap year
Duration of day at poles is 6 months.
Equinox means equal days and nights
Sun’s energy is called Insulation
The visible yellow face of sun is called Photosphere
The gravity of sun is 28 times greater than that of earth
Moon completes 13 circles in a year around earth
Sun is 13 x 10 power 5 times larger than earth
Maximum duration of solar eclipse is 7 min 40 sec
Sun reaches its maximum angular distance from Equator at Solistice
Millions of asteroids orbit the sun in the asteroid belt between Mars and Jupiter
Asteroids (minor planets) are make of rock, metal or a mixture of both.
First asteroid discovered was Ceres by Italian astronomer Guiseppe Piazzi in 1801.
Ceres is the largest asteroid
Chiron is one of several distant asteroids which orbit between Jupiter and Uranus
The largest crater on the surface of moon is called to Bailly.
Corona is the outer most halo of the Sun.
Comet is made of ice and dust
Edmond Halley was the first to calculate the path of a comet and predict when it would be seen again.
Halley’s comet was named in his honor though he did not discover it.
The patterns in stars are called constellations.
In 1930, astronomers finally agreed how to divide the whole sky into 88 areas, which are called constellations.
Closest star is Gienah
Speed of light is 3,00,000 km/sec
Which planet is named after the Roman god of war? Mars
Galaxies are the families of stars.
About 80% of galaxies are elliptical and other are spiral
Elliptical galaxies contain very little gas and dust and hardly any new stars are born in them.
Spiral galaxies are disk shaped and usually have clouds of dust and gas where new stars are born.
Light travels at 3,00,000 km/s. the speed at which you can round the world seven times in very second.
Light takes 8 minutes to reach the earth from sun.
In space light travels 9461 million million km in a year. Astronomers call this distance a light year.
Two planet Earth’s could fit side by side inside the Great Red Spot of Jupiter.
Jupiter’s volcanic moon is called IO and other moons are Europa, Ganymede and Callisto.
Ganymede is the largest moon in the solar system.
Europa is the moon of Jupiter
The moon has no atmosphere because its gravitational pull is not strong enough to hold an atmosphere
Chondrite meteorites are the oldest rocks in the solar system.
Venus is the only planet that rotates clockwise.
‘Galileo Satellites’, named after their discoverer, are four large moons of the planet
Mars contain atmosphere of Carbon dioxide and Uranus contain atmosphere of Hydrogen and Helium.
Venus is about the same size as Earth.
Venus’s atmosphere is 90 times thicker than our. It traps so well that the temperature of Venus’s surface is about 430 degree centigrade.
Closest star is (Gienah) 680,000 million, million, kilometers.
Nicolous Copernicus (1473-1543) was born in Poland. He was the first to explain the solar system.
Chiron is one of several distant asteroids with orbits between Jupiter and Uranus.
In the Solar system there are 2 Mount Olympus's Greece and where- Mars
What is the brightest star always in the Northern sky-Vega
The most common element in the universe is Nitrogen.
Hydra is the largest of the 88 constellations found in the universe. It covers about 3.16 % of the entire sky.
The M-class supergiant Betelgease with a diametre of 700 million kms is the largest star of the universe. It is about 500 times greater than the sun.
What is the common name for the star Sirius: Dog Star
Pluto (the Planet) was almost called what name-Zeus
When a satellite is closest to Earth its position is called what Perigee
30 km/s is the approximate mean velocity with which earth moves round the Sun in its orbit.
The earth’s reflectivity of solar radiation is termed as albedo.
Joseph von Fraunhofer was the first to explain the presence of dark lines in the sun’s spectrum.
Light of sun reaches the earth in.....499 seconds
Hale-Bopp comet was the most distant comet ever discovered which became visible in December, 1996.
What is the name of the largest moon of Jupiter-Ganymede
M31 is the nearest galaxy to us - what is its other name-Andromeda
The earth is the densest planet of universe .It has density of 5.515 time that of water.
Halos around the moon are formed because of the phenomenon of ___ (optical phenomena)
What is unique about the pistol star- Brightest in sky
Name the first teddy bear in space- Mishka 1980 Olympic mascot
What celestial body gets its name from the Greek long haired Comet
What's unusual about the moons of Uranus-Named Shakespeare characters
