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Scientists around the world have been tracking the promising Comet ISON because of its potential to star in a spectacular celestial show later this year, but from now through Aug. 8 the comet is on a "summer sabbatical."

which some have hailed as the next "" is currently located too near the sun to be seen from Earth. Since June 22, the comet has been less than 18 degrees from the sun and therefore cannot be seen against a dark sky. Your closed fist held at arm's length covers about 10 degrees of the sky.

Currently located against the stars of the zodiacal constellation of Gemini, or the twins, the comet is progressing slowly eastward and will cross over into the boundaries of Cancer, the crab, on Aug. 1. A week later, on Aug. 8, the comet will have moved out as far as 18 degrees from the sun and once again will be evident against a dark sky. []

Comet ISON has brightened little, if at all, since the start of 2013, and when last seen was hovering at magnitude 15.5, making it nearly 4,000 times too dim to be seen with the unaided eye.

To readily observe the dim, fuzzy blob of ISON prior to June 22, you would have needed a very dark sky and awith at least 20 inches (50.8 centimeters) of aperture, if not more.Comet ISON is too close to the bright twilight, but that will change after the first week of August as ISON then a morning object begins a slow emergence into the morning sky.

Both amateur and professional astronomers will have their fingers crossed that by early August ISON will have shown significant brightening since it was last seen in late June.

Mercury will be passing 4 degrees south of the comet on Aug. 8 and might be used to steer an observer toward ISON. But, by then, the comet will still be rather faint probably about magnitude 13, although it might reach to magnitude 11 or even 10 by the end of August. Astronomers use a number-based magnitude scale to determine the . The lower the magnitude number, the brighter the object.

With Comet ISON'sbrightnessapparently stalled as it disappeared into the glare of the sun, it's anybody's guess just how bright the object will shine when it reappears in early August.



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