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What is star gazing ? How is it accomplished ? |
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Answer» Solution :Star gazing is the process of observing very far off stars. For this, we need radicallydifferenttelescopes. To see farther, more LIGHT must be COLLECTED, which would require larger MIRRORS. Themassive mirror bend under their oun weigt distorting the images. To overcome these limitations, two approaches are being TRIED : Active optics and SpaceTelescope. In the first category, flexible mirrors are used whose shape is changed under computercontrol to secure a sharp focus INSPITE of the effects of gravity and temperature changes. In the second category, Hubble Space Telescope was launched into earth's orbit by USA in 1990. |
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