Exempel på perihelion

• In the low and nominal cases maximum exposure occurs in the southern hemisphere at perihelion, intuitively consistent with a relatively optically thin atmosphere.

• Also, the increased daytime period is evident towards perihelion, escalating further the total daily dose.

• One, after a sensational first-sighting, seems to have retreated to outer space; its last perihelion was a disappointment.

• The general shape of the diurnal profiles between perihelion and aphelion are similar, but dose values vary markedly.

• Einstein found that his theory correctly ' predicted, ' actually retrodicted, the numerical value of the perihelion advance.

• Einstein's derivation of the perihelion advance, which was based on an approximation, had, however, one blemish: the uniqueness of the solution remained questionable.

• When the perihelion passage takes place in northern summer, the maximum temperature is lower in the southern hemisphere, so the soil humidity is higher in the south.

• The remaining three orbital elements - the longitude of the ascending node, the argument of perihelion, and the mean anomaly - were each randomly selected from the range 0-360x.

• The comet brightened steadily as it approached perihelion.

• During the 2005 perihelion passage the comet brightened to about apparent magnitude 16.

• Unlike a long-period comet, the next perihelion passage of a numbered periodic comet can be predicted with a high degree of accuracy.

• At its closest, it is only 0.26 astronomical units away from the sun, having the 32nd closest perihelion of any minor planet.

• Also, since perihelion and aphelion do not happen on exactly the same dates as the solstices, the maxima and minima are slightly asymmetrical.

• In 2004, residents of the southern hemisphere had the opportunity to watch the comet gradually brighten as it raced toward perihelion.

• Increasing the eccentricity lengthens the time spent near aphelion and shortens the time near perihelion.