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Could I see the Sun rise and set from space?

  • Could I see the Sun rise and set from space? A Astronauts aboard a space shuttle orbiting the Earth actually see 16 sunrises and sunsets every day! This is because once in orbit, a space shuttle goes around the Earth at a speed of more than 28,000 kilometres per hour (17,400 miles per hour) and takes only 90 minutes to complete one orbit. Q Is it possible to live in space? A Today astronauts spend a great deal of time in space stations. A space station is a floating space base. It is like a spaceship designed so that astronauts can live in outer space for weeks, months or even years at a time. Unlike a spacecraft, a space station cannot take off or land on planets. Other vehicles are used to transport people and materials to and from the station. Space stations are used for studying the effect of long-term space flights on the human body as well as for space research. Q Is sending humans into space the only way to learn more about it? A Apart from sending astronauts into space, we also use satellites, probes and telescopes to study space. Like moons, man-made satellites revolve around planets and help us learn more about them. A probe is an unmanned spacecraft sent into space to study objects other than the Earth. We have even put huge telescopes into orbit. The Hubble Space Telescope, sent into orbit in 1990, is the best-known among these. It is better to have a telescope in space than on Earth, because then there is no atmosphere to distort the image received by the telescope. However, the biggest telescopes are too big to be sent to space.

    Many sunrises and sunsets When astronauts are on board a spacecraft and orbiting the Earth, they are moving much faster than the Earth, so they can see the Sun rise and set many times in a day. The normal human biological cycle can be upset by this, so astronauts are given special medicines to help them sleep. Humans in Space 

    Looking back in time The Hubble Space Telescope works like a time machine that can travel into the past. It took pictures of the universe when it was barely a billion years old – the universe is at least five billion years old now, though some scientists put its age as high as 14 billion years. The Hubble Space Telescope can look into the past because it takes billions of years for light from the far ends of the universe to reach the telescope. When the light reaches it an image is captured, and we can see what happened in that particular part of the universe long ago.