"SPACE EXPLORATION" презентация

EXPLORING SPACE FROM ANCIENT TIME TO NOWADAYS.

Space Exploration from Ancient Times to Nowadays

People have been studying space since very old times. They divided stars into groups – constellations giving them names: Orion, Taurus, Leo, Virgo, Aquila, Lyra, Vega, Andromeda, Cassiopeia, Draco, Ursa Major and Ursa Minor and others. Some of these constellations appear to rotate around the North Pole Star.

Just over 400 years ago, Galileo invented a device that allowed viewers to see very distant objects as if they were nearby (the first telescope). Since that time astronomy started developing rapidly – people began making discoveries.

Then the era of space flights started in the 20 century.

October, 1957, Laika, a Soviet Space dog was the first animal to orbit the Earth on board “Sputnik 2”.

Then August, 1960 dogs Belka and Strelka were sent into space on board “Sputnik 5”. The flight lasted more than 25 hours, orbiting the Earth 17 times.

Yuri Gagarin was the first human to journey into outer space when his Vostok spacecraft completed an orbit of the Earth on 12 April 1961. The flight lasted 108 minutes.

Conditions on board a space vehicle orbiting Earth greatly differ from those on its surface – everything on board a ship is in the state of prolonged weightlessness. What can weightlessness be used for? Many well-known processes go on differently due to the absence of weight.

The burning candle. There have been experiments in space to this effect, the flame reacts to gravity and burns up on earth. In low to no gravity places, the flame makes a more spherical shape.

New materials can be obtained, the components of which would immediately separate on Earth because of convection. In case of metals, glasses or semiconductors, they can be cooled down to the solidification point even in space and then brought back to Earth. Such materials will possess quite unusual qualities.

Numerous experiments carried out at the Russian orbital space stations have paved the way to the development of methods and means of industrial production of new materials of better quality on board a spacecraft.

There are a lot of specific innovations developed as a result of space program research. We’ll name just few of them. Teflon cookwear sets, teflon-coated fiberglass roofs.

Satellite researches help scientists around the world understand the earth's atmosphere in order to improve weather and natural disaster predictions.

We can’t imagine our life nowadays without such things as satellite television, GPS, mobile phones and the Internet which have appeared thanks to the development of space technologies.

Many spin-off technologies from space research have found their way into industrial applications. Examples are computer programs that are used to design cars.

The plasma arc-welding torch is now commonly used for sheet-metal welding.

Battery-operated, compact drills were invented for the Apollo astronauts in order to collect moon rock samples.

Fire-resistant materials made for spacesuits are now utilized by firefighters, auto racers and hazardous-materials handlers.

Nickel-titanium alloys used in satellites are now found in braces.

The excimer laser, a specialized beam of light that dissolves organic tissue without burning it, is used in surgery.

The ear thermometer is based on infrared sensors developed for measuring the heat of stars.

Thank you for your attention.