I was two beer down heading towards mysterious sky and perplex with many concepts like Big Bang, Moon, Satellite, Solar System. Deep into thoughts and recent Interstellar movie arouse my excitement and it reached to that extent i was having fourth bottle. I came down and opened my dilapidated laptop and browsed the giant google.com. And it goes in this way
Universe- It is define as totality of existence, including planets, stars, galaxies.
Big Bang is prevailing cosmological model that describes early development of universe which is believed to have occurred about 13.7 billion years ago and this data is consider as the age of universe.
Explanation- According to this theory, universe was once in an extremely hot and dense state which is expanded rapidly. This rapid expansion caused the universe to cool and resulted in its present expanding state.
Galaxy- A galaxy is a massive, gravitationally bound system consisting of star, stellar elements and dust. The word galaxy derived from Greek literally "milky", a reference to milky way.
Milky Way- is the galaxy that contain our system. The word milky is defined for its appearance in the sky.
Etymology- Zeus places his son born by a mortal woman (Alcmene), the infant Heracles, on Hera's breast while she is asleep so that baby will drink her divine milk and will thus become immortal. Hera wakes up while breast feeding and then realises she is nursing an unknown baby; she pushes the baby away & jet of her milk sprays the night sky, producing faint band of light known as milky way. Click to watch "Clash of Titans" for Zeus and Alcmene
Star- A star is massive, luminous sphere of plasma (certain portion of particle is ionised) held together by gravity. The nearest star to earth is sun.
Age- Most star are between 1 to 10 billion years old. Some are may close to 13.7 billion years old-observed age of universe. The oldest star yet discovered, HE1523-0901. Temperature in core region of star may be several millions.
Solar System- Consists of sun and its nine planets, their moons. It formed 4.6 billion years ago from collapse of giant molecular cloud.
"Earth & Planets move around the sun."
Moon- Natural satellite or secondary planet. Mercury and Venus have no moon while Earth have (as you know)
Satellite- is an object which has been placed into orbit by human endeavour. Such objects are sometimes called artificial satellites to distinguish from natural satellites such as moon which is explained before. The world's first artificial satellite is "Sputnik 1".
"History of Greek Mythology"-
Zeus consider as father of gods & men. He is god of sky and thunder. He had five wives, first was moon.
Theogony- Fifth wife of Zeus
Hera- Consort of Zeus, Queen of gods, goddess of marriage women &birth. She was one of 3 sister of Zeus.
Heracles- also known as Hercules, son of Zeus & Alcmene.
After this some of my doubts and confusion gone. I hope you gonna like it.
Feel free to comment and suggestions are welcome.
