from The Century Dictionary and Cyclopedia

  • n. One of the dark patches, from 1,000 to 100,000 miles in diameter, which are often visible upon the photosphere.
  • n. A freckle.
  • n. A spot on leaves produced by excessive heat of the sun. Compare heliosis, 1.


Sorry, no etymologies found.


  • The dangers to the planet Earth are more from the coming sun-spot activity that is about to hit us in five to ten years, if not sooner.

    On Thursday, the Legg report will be published along with...

  • It is singularly ironic that whereas warm-mongers try to ridicule sun-spot cycles as an influence on temperature increase, now that the upwards trend in temperature has ceased, they are turning to the unusual absence of such sun-spot activity as an excuse for the fact that global warming has indeed ceased.

    On Thursday, the Legg report will be published along with...

  • For Wolfs information, which you might refer to NASA or Greenwich Observatory to confirm, it has been known for over a century that the Earths climate fluctuates in direct response to sun-spot activity, the so called "Maunder Cycle".

    On Thursday, the Legg report will be published along with...

  • At the moment, there is a pronounced absence of the usual increase in sun-spot activity expected at this point in the cycle, which is expected to correlate with a cessation of warming driven by the increase in sun-spot activity prior to this.

    On Thursday, the Legg report will be published along with...

  • I wonder if the theory voiced by some -- that we just reached the end of an 11 year sun-spot cycle -- has some virtue to it.

    Global Warming?

  • This is one of those over-the-top, fantastical stories that the Sheeple in Fly Over country would perhaps hear when a sun-spot changes their radio channel to a Blue State radio channel, they hear the real story and go….

    Think Progress » 5 Questions the White House Must Answer About Jeff Gannon

  • Some good pictures of the solar corona taken during solar eclipses, a series or two of sun-spot photographs, and a very limited number of successful attempts made upon the moon, and planets, and star clusters, were all the fruits of their labors.

    Scientific American Supplement, No. 484, April 11, 1885

  • Like magic that sun-spot always quickened their pace, and they often hailed it with a shout.

    Reveries of a Schoolmaster

  • When a sun-spot has completed its period of existence, the photospheric matter overwhelms the penumbra, and rushes into the umbra, which it obliterates, causing the spot to disappear.

    The Astronomy of Milton's 'Paradise Lost'

  • The exact moment of the origin of a sun-spot cannot be ascertained, because it arises from an imperceptible point; it grows very rapidly, and often attains its full size in a day.

    The Astronomy of Milton's 'Paradise Lost'


Log in or sign up to get involved in the conversation. It's quick and easy.