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Dennis Mammana


A Celestial Soap Opera Week of Oct. 26 — Nov. 1, 2014 Did you ever wonder what people did for entertainment before there was television and computers? Well, before TV and the Internet there was radio. And before radio — long before radio — there was ... …Read more. A Cover-Up of Cosmic Proportions Week of Oct. 19-25, 2014 We can never predict when the next cover-up will occur in our nation's capital, but we can with those in the heavens. And on Thursday, Oct. 23, we'll be having a good one: a partial eclipse of the sun. It's been a couple of …Read more. Find Uranus After Dark Week of Oct. 12-18, 2014 Hindsight is 20/20. Anyone who has lived for more than a few years has certainly learned this lesson well. It's true in astronomy as well as life, and this can be a sobering thought for anyone who's ever gazed upon the …Read more. Total Lunar Eclipse Week of Oct. 5-11, 2014 Astronomers often tell this amusing tale. An early European explorer had become stranded on an island inhabited by a relatively primitive tribe. The explorer — knowing that an eclipse of the moon was imminent — …Read more.
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Chasing Down Mercury


Week of Nov. 2-8, 2014

Mercury is one of those planets we rarely see.

Unlike Venus, which can dominate our sky with its brilliance, or Jupiter, Mars or Saturn that can shine brightly all night long, Mercury appears for only a few weeks each year and, even then, requires quite a bit of effort to find it.

Its elusiveness is legendary; it's been said that the great 16th century Polish astronomer Nicolaus Copernicus — who overturned the long-held notion that the Earth occupied the center of our planetary family — had never actually seen this world with his own eyes.

I wouldn't be surprised since, from our terrestrial vantage point, Mercury always appears so close to the sun that it's often lost in its glare. This occurs because Mercury is the innermost world of our solar system, and whips around its orbit once every 88 Earth-days at a distance of only 36 million miles from the scorching face of the sun.

Only when it reaches a significant "elongation" from the sun can we hope to see it, and this occurs only at dusk or dawn. In fact, some of the ancients thought of Mercury as two different bodies. The Greeks, for example, called it Hermes, the messenger of the Gods, when it appeared in the waning light of dusk, and Apollo when it shone in the morning before sunrise.

If you've never had the pleasure of spotting this fascinating world, now might be a great time to try.

To find it, head outdoors about an hour or so before sunrise, and begin scanning low in the eastern sky with binoculars.

You may spot Mercury as a bright, flickering "star" only a few degrees above the horizon. About 30-45 minutes before sunrise, you should be able to see it with the unaided eye, not far from the star Spica.

Keep watch from morning to morning as Mercury appears to brighten as well as approach the star Spica until Nov. 4, when the two will form a beautiful pair in the morning twilight. After that, the planet appears to separate from the distant star as it drifts closer toward the horizon.

You can try aiming a small telescope in its direction, but you may be disappointed by what you see. First off, this planet is rather small — barely the size of the continental United States. And secondly, its appearance near the horizon means that its light must pass through a tremendous amount of distorting atmosphere before reaching our eyes.

If you're fortunate enough to see a relatively steady image, you might notice that Mercury now displays a nearly "quarter" phase, not unlike the moon does from time to time.

Mercury is a tiny planet and quite different than any other in our solar system. Because it's much too small and close to the sun to sustain an atmosphere, the temperature on its daytime side soars to hundreds of degrees, and on its nighttime side plunge to hundreds of degrees below zero. And spacecraft photos of this dry, cratered world look remarkably like those of the moon.

If, like the great Copernicus, you've never watched the antics of Mercury, don't miss the show this week!

Visit Dennis Mammana at To read features by other Creators Syndicate writers and cartoonists, visit the Creators Syndicate website at



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