Geography
The study of universe is known as Cosmology. Total universe is commonly defined as the totality of everything that exists including all physical matter and energy, the planets, stars, galaxies and the contents of intergalactic space.
Galaxy: A galaxy is a vest system of billions of stars, dust and light gases bound by their own gravity.
There are 100 billion galaxies in the universe and each galaxy has, an average, 100 billions stars. (1022 stars)
Our galaxy is Milky Way Galaxy (or the Akash Ganga) formed after the Big Bang. It is spiral in shape.
Andromeda is the nearest galaxy to Milky Way.
Latest known galaxy in Dwarf Galaxy.
The Big Bang Theory: Big Bang was an explosion of concentrated matter in the universe that occurred 15 billion years ago, leading to the formation of galaxies of stars and other heavenly bodies.
Stars are the heavenly bodies made up of hot burning gases and they shine by emitting their own light.
Black Hole stars having mass greater the three times that of the sun, have very high gravitational power, so that not even light can escape from its gravity and hence called black hole.
Comets: Made up of frozen gases. A Tailed Star.
They move around the sun in elongated elliptical orbit with the tail always pointing away from the sun.
Hailey's Comet Reappears in 76 years. last seen in 1986.
Constellation: The sky is divided into units to enable the astronomers to identify the position of the stars. These units are called constellation. There are 88 known constellations. Ursa Major, Ursa Minor, Orion, Scorpion.
Satellite are the heavenly bodies that revolve around the planets. Moon is the natural satellite of the earth.
Moon
Diameter
3476 km
Average distance from Earth
384365 km
Rotation Speed
27 days, 7 h, 43 min and 11.47 sec
Revolution Speed
27 days, 7 h, 43 min and 11.47 sec
Time taken by moon light to reach the Earth
1.3
Solar System
The solar system consists of the Sun, the eight plants and their satellite (or moons), and thousands of
Galaxy: A galaxy is a vest system of billions of stars, dust and light gases bound by their own gravity.
There are 100 billion galaxies in the universe and each galaxy has, an average, 100 billions stars. (1022 stars)
Our galaxy is Milky Way Galaxy (or the Akash Ganga) formed after the Big Bang. It is spiral in shape.
Andromeda is the nearest galaxy to Milky Way.
Latest known galaxy in Dwarf Galaxy.
The Big Bang Theory: Big Bang was an explosion of concentrated matter in the universe that occurred 15 billion years ago, leading to the formation of galaxies of stars and other heavenly bodies.
Stars are the heavenly bodies made up of hot burning gases and they shine by emitting their own light.
Black Hole stars having mass greater the three times that of the sun, have very high gravitational power, so that not even light can escape from its gravity and hence called black hole.
Comets: Made up of frozen gases. A Tailed Star.
They move around the sun in elongated elliptical orbit with the tail always pointing away from the sun.
Hailey's Comet Reappears in 76 years. last seen in 1986.
Constellation: The sky is divided into units to enable the astronomers to identify the position of the stars. These units are called constellation. There are 88 known constellations. Ursa Major, Ursa Minor, Orion, Scorpion.
Satellite are the heavenly bodies that revolve around the planets. Moon is the natural satellite of the earth.
Moon
Diameter
3476 km
Average distance from Earth
384365 km
Rotation Speed
27 days, 7 h, 43 min and 11.47 sec
Revolution Speed
27 days, 7 h, 43 min and 11.47 sec
Time taken by moon light to reach the Earth
1.3
Solar System
The solar system consists of the Sun, the eight plants and their satellite (or moons), and thousands of