Schematic Diagram Of Panasonic Microwave Oven

Comets are large balls of snow, dirty, and only vaguely round, running around the sun. They are made of elements formed in stars that exploded long before our sun comes on. The scientists believe that such a huge distance from the sun there are more 100 billion comets that we can only see when you close enough to our star to have a luminous trail.

So far we have seen only a few thousand. The largest known comet has a core that measures 32 km from side to side.

When comets approach the sun the ice of which they are formed is transformed into vapor and spread all around the powder was packed inside.

's probably the oldest existing dust in the Solar System. According to scientists, it contains clues about our cosmic neighbors at the time of the birth of the planets, more than 4.6 billion years ago.

The nucleus of Halley is qusi 16 km wide and more or less every 76 years back close to the sun always build a little 'more and form a tail visible from Earth.

E 'come and will return in 1986 (alas) in 2061!

Usually comets revolve distant from us, but every now and meanwhile someone is close to our star and then there are two possibilities:

soon as possible - like Comet Halley - remain trapped by the gravity of the sun and will continue to walk around until they melt completely, or will hit a planet that will be on their orbit.

Second chance - thanks to their speed or far enough away to not be trapped by the solar gravity, comets such as Swan, continuing the journey to another seat as a veritable rogue space pass us by once and continue for hundreds of thousands of years, sometimes less, but sometimes more.

" .. By the way the stars were moving around him, George realized that the comet was falling fast. But he did not feel anything, I had tingling in my stomach and felt the wind face. It was not as he imagined the roller coaster. But starting to realize that space is provisional different feelings than on Earth ...."

Lucy & Stephen Hawking - The secret key to the universe -