High-Energy Astronomy (Astronomy In Space)

We now discuss the techniques and instruments used by astronomers observing at wavelengths shortward of 91.2 nm. Temperatures in excess of 105K, or non-thermal mechanisms, are required if significant emission is to occur at these wavelengths, and thus we may consider ourselves dealing with high-energy astronomy. Extreme ultraviolet (100 —10nm), soft X-ray (10 —1nm), X-ray […]

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Telescopes In Space (Astronomy In Space)

We have already emphasized, in the introduction to this chapter, the great value of launching telescopes into space. This section concentrates on the infrared, optical and ultraviolet wavebands. It is unlikely that radio telescopes will be placed in orbit in the near future, owing to the enormous size necessary for reasonable angular resolution, but several […]

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Exploring The Solar System (Astronomy In Space)

The results of many of the space missions to the Moon and planets have already been detailed in the chapters on the Solar System. In the present section we outline some of the methods by which these results were obtained. The pattern of study of a planet by subsequent spacecraft generally parallels that applied to […]

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Space Travel And The Space Environment (Astronomy In Space)

The orbit of an artificial satellite about the Earth, or any other body, can be treated mathematically in exactly the same way as the motion of binary stars, or the planets. The orbit is an ellipse obeying Kepler’s laws. The period of a satellite grazing the Earth’s surface (if it were possible) is 84.3 minutes, […]

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Introduction (Astronomy In Space)

The science of space astronomy is relatively young, and yet it has given astronomers some of the most exciting findings about our own Solar System and the high-energy Universe beyond. Were it not for the development of a camera that could be operated across 200 million km of interplanetary space we would know hardly anything […]

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