Did you know...     Kangaroos can’t walk backwards!       Australia is the only continent in the world that doesn’t have a volcano!      Rabbits and Parrots can see what is behind them without turning their head!      Venus is the only planet in the Solar System that rotates clockwise; all others rotate anti-clockwise!      Honey is the only food that doesn’t get spoilt!       Hands and feet have half the bones in the human body!      Apples float in water! That’s because they are made up of 25% air!       Human eyes can see over 10 million colours!       The deepest point in the ocean is the Mariana Trench which is 11km or 6.9 miles deep!      Robert Peary was the first person to reach North Pole in the year 1909!      During the summer months in the Arctic, the sun doesn’t set at all!      The human heart beats 72 times a minute and women’s heart beats faster than men’s!       85% of the world’s plant life is found in the ocean!

Hubble Telescope

Hubble Telescope, World’s first optical telescope that was launched into low Earth orbit in 1990, and remains in operation. With a 2.4-meter mirror, Hubble’s four main instruments observe in the near ultraviolet, visible, and near infrared spectra. It is powered by Sun and its electricity is stored in six nickel – hydrogen batteries, equivalent to 20 car batteries.

hubble

It doesn’t travel to faraway stars but instead snaps incredible pictures of them .It is named after Edwin P Hubble who discovered many galaxies in the universe. At 43.5 ft long and with a diameter of about 14ft, Hubble Telescope equals the size of a bus.

The telescope is so steady and accurate that it can take an image of a target without deviating more than 7/1000th of an arcsecond or about the width of a human hair seen at a distance of 1.6km.

One of the best known images is of the vast Carina Nebula, an interstellar cloud of dust, hydrogen gas, helium gas and plasma that lies some 6500 light years away from Earth. Below are the important statistics related to Hubble Telescope.

Launch date: April 24, 1990

Orbit height: 559 km

Speed on orbit: 7.5 km/s

Power: 2,800 watts

Cost: 2.5

billion USD

Source: Wikipedia, hubblesite,org

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