Alfred Nobel

(October 21, 1833 - )

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Alfred Nobel was born in Stockholm on October 21, 1833. His father Immanuel Nobel was an engineer and inventor who built bridges and buildings in Stockholm. In connection with his construction work Immanuel Nobel also experimented with different techniques for blasting rocks.

Alfred's mother, born Andriette Ahlsell, came from a wealthy family. Due to misfortunes in his construction work caused by the loss of some barges of building material, Immanuel Nobel was forced into bankruptcy the same year Alfred Nobel was born. In 1837 Immanuel Nobel left Stockholm and his family to start a new career in Finland and in Russia. To support the family, Andriette Nobel started a grocery store which provided a modest income. Meanwhile Immanuel Nobel was successful in his new enterprise in St. Petersburg, Russia. He started a mechanical workshop which provided equipment for the Russian army and he also convinced the Tsar and his generals that naval mines could be used to block enemy naval ships from threatening the city.

Why is the sky blue ??

Did you know, really the sky is not blue, but rather consists of different colors.Sometimes a gray or black (eg, night sky), sometimes red or gold (the twilight sky and the sunrise time of course), often also white or shiny blue.

Apparently the sky is so colorful. So the question then is how can you?

The sky is black of course because there is no sun that shines at night. While the sky is gray indicates there are a lot of dust particles as a result of dirty gases in the air.

Images of the Universe in a Black Hole

Black holes (black holes) are still a mystery of the universe is much studied by scientists. Black hole is large enough concentration of mass so as to produce the gravitational force and mass density is so great. A large force of gravity prevents anything escape from it, including light.

You can imagine what is seen around the black hole at any sucked into it. Intrigued by this Alain from the Institut d'Astrophysique Riazuelo de Paris was simulated by combining a collection of space imagery. The result, a stunning three-dimensional picture.