No Clouds? Well, Then, No Excuse

This Monday morning, Aug. 13, you have a spectacular reason to wake up very early.  How spectacular? Simply the most promising moment in the most promising meteor shower of the year: The Perseids.

   How early?

   Well, substantially before the sun rises, but the sun has witnessed a few meteor showers in its day (approximately 4.6 billion years of age).

   When the clouds cooperate and the sky is clear, meteor showers are truly phenomenal.  Even from a New York City rooftop where the light pollution obliterates most astronomical highlights, a fireworks display of “shooting stars†provides an incomparable visual gift.  Here in the Tri-State area, particularly this year, a little effort goes a long, high way.

   You need not be overly precise, but try to obtain an unobstructed view of the sky any time near 4 a.m. on Monday morning.  This is not a homework assignment; if you miss the exact moment (predicted by the International Meteor Organization www.imo.net), anytime before sunrise will still be well worthwhile.  Face northeast.  Again, please do not be intimidated.  In the absence of clouds, one beautiful feature of a good meteor shower is that it just pays off.  It’s like a thundershower: It won’t be constrained to any overly specific point in time or space, but when it happens, there’s no denying it.

  Approximately every minute (and potentially twice that often this year), you’ll see a colorful burst race across the sky.  Just when you’re trying to confirm whether you really saw what you thought you saw, you’ll be hit by another one: in a different part of the sky, in a different direction, in a different color.  And they’ll just keep going.

   “Shooting stars†are actually little pieces of cosmic debris (outer-space garbage) hitting our comparatively hot atmosphere and flaring up.

   The average temperature of deep outer space is approximately 400 degrees Fahrenheit below zero.

    So our high atmosphere (averaging in temperatures near 400 degrees Fahrenheit above zero) offers an intense welcome-wagon to any random piece of rock or ice that might happen by — particularly to those that do so at high speed.  

   Occasionally, comets zoom past our sun. When these icy objects melt, they shed a substantial layer of suitable debris.

    Earth’s intersection with a comet trail is remarkably predictable. Hence, meteor showers and our ability to forecast them.

   It just so happens that Earth’s moon will have waned to an entirely new (obscured) moon on Sunday night, Aug. 12.  So Mother Nature will present as dark as possible a sky for the Perseid Meteor Shower this Monday morning.

   If there isn’t a cloud, there isn’t an excuse.

   Wake up and look up.

    If luck does not cooperate, keep the faith.

    As for more drama, a total lunar eclipse is anticipated for Aug. 28.

   Editor’s note: Readers with questions for Dan Yaverbaum about the the sky and what’s happening up there can send them to Compass@lakevillejournal.com.

   On another note, I stand corrected. It is not a planetarium at the Berkshire School that Yaverbaum is in charge of. It’s the observatory at the Berkshire School.  — M.E.

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