Sputnik II, first artificial satellite, was launched 3 November, 1957. The first Western Scientist to suggest that the Earth revolved around the Sun was Copernicus. Skylab was space laboratory launched in…

America launched its first space station in 1973. Six of the eight planets of the solar system were known in the life time of Kepler, the formulator of laws of planetary…

Super Nova means a dying star. Asteroids or planetoids circle between Mars and Jupiter. The earth revolves around the sun at a speed of 29 km/sec. Eratosthenes was the first to…

The Milky Way extends through a distance of 105 light years. Venus has almost the same mass, size and density as the earth. The biggest star in our galaxy in Proxima…

The outermost layer of Sun is Corona. The altitudes of heavenly bodies appear to be greater than they actually are. This is due to Atmospheric refraction. A star which appears blue…

Occurrence of ozone is most relevant for the presence of life on Mars. The mean distance from the earth to the Sun is 149200000 km. Earth has the largest amount of…

Uranus orbits around the sun in a clockwise direction from east to west. Mercury and Venus lies between the sun and the earth. Saturn is 9.5 times bigger than the earth.…

The visible part of the sun is called Photosphere. The rings of Saturn were discovered by Galileo in 1610. The comet, named after Edmund Halley, reappears after a time interval of…

A light year is equal to 9.50 Million kilometers. The temperature of Sun’s center is 15 million C and the temperature of outer surface of sun is 5500 to 6000 C.…