A constellation is a group of stars that, when seen from earth, form a pattern. There are 88 constellations, the largest of them being Hydra ( the water snake) which extends over 3.158% of the sky. Ursa major ( the great bear) is a constellation visible throughout the year in most of the northern hemisphere.
A star is a huge, luminous ball of gas and plasma held together by gravity. All stars begin from clouds of cold molecular hydrogen. The gas circles through space in cosmic dust clouds called nebulae. In time, gravity causes these clouds to condense collect into a ball that continuous to collapse under its own gravity […]
The milky way is a part of group of galaxies held together by gravity, called the local group. It can be seen as a hazy band of light stretching across the night sky. It has a central bulge, a disk, and a halo. The halo and bulge contain old stars and the disk is filled […]
THE BIG BANG The strong explosion released radiation, particles and clouds of atoms. At first, the universe was like a fireball tinier than an atom. As it expanded, it began to cool and tiny particles of energy and matter began to form a thick, soup – like material. Gravity pulled the particles together and atoms […]
The Universe is a vast expanse of space, which contains all of the matter and energy in existence. Astronomical and geological evidences indicate that the universe is approximately 13.75 billion years old. It is believed to have come into existence in a massive explosion called the big bang. It is very large and possibly infinite […]