Unit 5- The Universe
Naked Eye-Simple Vista
Space Exploration-Exploración del Espacio
Artificial Satellites-Satélites Artificiales
Man-Made-Hecho por el hombre
Carry-out-Llevar a cabo
Space Shuttle-Transbordadores Espaciales
Space Probes-Sondas Espaciales
Space Station-Estaciones Espaciales
The planets in order of size are Jupiter, Saturn, Uranus, Neptune, Earth, Venus,Mars and Mercury.
Mankind has always observed the skies: first, with the naked-eye, later with telescopes. In the last 50 years we have explored outer space with spaceships.
Space exploration began in the 1950´s when the United States of America and the Soviet Union started their space programs. The first step was the launching ofartificial satellites, which are man-made objects designed to orbit the Earth. They are launched into orbit using rockets.
After the success of artificial satellites the next challenge was to safely send a man into space and back on a manned space flight. In 1961 Yuri Gagarin became the first man to travel into space.
On July 20th 1969, Neil Armstrong became the first human to set foot on our natural satellite, the Moon. Edwin Aldrin and Michael Collins were also aboard the Apollo 11 spacecraft. Their mission was to carry out experiments and to examine and photograph the lunar surface.
Today, space travel seems normal, rockets are still used but newer vehicles have been developed.
Space Probes are un-manned spaceships used to explore parts of the universe that are very far away.
Space Stations are large artificial satellites made to study space. Astronauts can live inside them for weeks and months
Today, hundreds of artificial satellites orbit the earth. The information they send helps us: forecast the weather, transmit television and mobile phone signals,navigate airplanes and ships.
Someday a manned mission to Mars might happen. Meanwhile, countries are working together to explore Mars. Thanks to these missions, scientists believe that water once existed on Mars.