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24992 results in Astronomy: General Interest

Page 1211 of 1250

  • LECTURE I - THE SUN

  • Robert Stawell Ball
  • Book:
    Star-Land
    Published online:
    01 June 2011
    Print publication:
    03 June 2010, pp 1-69
    First published in:
    1889

  • Summary

    THE HEAT AND BRIGHTNESS OF THE SUN

    We can all feel that the sun is very hot, and we know that it is very big and a long way off. Let us first talk about the heat from the sun. On a cold day it is pleasant to go into a room with a good fire, and everybody knows that the nearer we go to the fire, the more strongly we feel the heat. The boy who is at the far end of the room may be shivering with cold, while those close to the fire are as hot as they find to be pleasant. If we could draw nearer to the sun than we are at present, we should find ourselves to be warmer than we are here. Indeed, if we went close enough, the temperature would rise so much that we could not endure it; we should be roasted. On the other hand, we should certainly be frozen to death if we were transported much further away from the sun than we are now. We are able to live comfortably, because our bodies are just arranged to suit the warmth at that distance from the sun at which the earth is actually placed.

    Suppose you were able to endure any degree of heat, and that you had some way of setting out on a voyage to the sun.

Page 1211 of 1250