On Satellite-Gazing
Posted by: SC Trails on August 13, 2009 at 10:01PM PST

During the lulls between Perseid meteors flashing overhead this past week, my family and I spent time tracking satellites. Unlike meteors, satellites swarm like bugs in the sky regardless of the date. These spacecraft are visible for a few hours after sunset and before sunrise. At these times, sunlight is still shining above us on the upper regions of Earth’s atmosphere, reflecting off the artificial satellites and making them visible.

Satellite-gazing is an enjoyable activity that requires no special equipment.

Easy to spot once you know what to look for, satellites look like dim stars sailing quietly across the sky. Satellites appear to move at about the pace of a jet or a bit slower, but their steady, unblinking light easily separates them from airplanes. Although they can move in any direction, the majority of satellites are in a polar orbit, which means they move from north to south or south to north.

Satellite-monitoring systems track these artificial objects overhead, and websites such as
Heavens-Above.com relate the details of each satellite. Enter your location to find out what that satellite was that you just saw, or get predictions of where and when to look to see specific spacecraft such as communications satellites, spent rockets, the Hubble Space Telescope, and the International Space Station, among others.

One constellation of communication satellites can create brief flashes of light so bright that they outshine all other stars and planets and can be visible in daylight. Known as Iridium flares, they are easily distinguished from meteors because their rise to peak brightness and subsequent dimming is much slower than a streaking particle of dust burning up in our atmosphere.

Learn more about
satellite observing before your next night of stargazing.

Photo credit: NASA

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Kelly Kizer Whitt loves clean, clear, and dark skies. Kelly studied English and Astronomy at the University of Wisconsin-Madison and worked for Astronomy magazine. She is currently the Feature Writer for Astronomy and Space at Suite101.com. You can follow her on Twitter at twitter.com/Astronomommy.


 

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(6) Comments
Posted by: Dave Simon on August 14, 2009 9:51AM PST
Several years ago, while leading a Sierra Club backpacking trip in Matterhorn Canyon in northern Yosemite, most of the group was participating in our nightly ritual of watching for shooting stars and satellites. As one *very* bright satellite was moving across the sky, we (and our surroundings) were suddenly illuminated by a bright flash, similar to a camera flash. At first, each person thought that they were having some sort of "very personal problem" -- but were greatly relieved when it became clear that the flash was observed by all. Thinking that the next event was going to be the appearance of aliens, we were again relieved when nothing further happened, except to talk about what the heck had happened for the remainder of the evening!

Posted by: GardenChamp on August 14, 2009 4:11PM PST
Spotting satellites from a campground is way cooler than from an urban area. Not just because of the light pollution, but because of the noise pollution. In the middle of the woods, where all you hear is your breathing, watching something float across the sky while lying on your back on a sleeping bag is pretty magical.

Posted by: Bob Sipchen on August 14, 2009 6:25PM PST
Dave's experience sounds unnerving but extremely cool. And I certainly agree with GardenChamp's viewpoint -- I do enjoy watching the blinking satellites. Still, am I the only one who thinks the night might seem even more majestic if the stars and planets didn't have to compete with metallic litter blasted into the sky by man (not that I don't appreciate all that satellites contribute)?

Posted by: Kelly Rae on August 15, 2009 10:36AM PST
I had a similar experience while vacationing in the Northwoods of Wisconsin. My husband and I were gazing at the stars when it looked like someone flahsed a headlight in the sky toward us. It was almost blinding. We both started to say something when it flashed again. I think it was probably a defunct satellite tumbling overhead, catching the sunlight just right to produce the bright flares.

Posted by: GonzoJohn on August 15, 2009 7:40PM PST
During Wilderness Wildlife Week in Pigeon Forge Tennessee (Google it), one of the nightly events is called an "owl prowl". A naturalist takes you on a winter night hike into Smoky Mountains NP and you walk into the woods a short way and call the owls in. My very first experience with an owl prowl was on a very cold clear night in February, and although we didn't stir up any owls, the satellite viewing was amazingly clear. Standing in the woods with a group of deathly quiet people staring at the clear night sky was really a great experience.

Posted by: drain on August 18, 2009 11:20AM PST
Whenever , I think of space satellites, I think of Billy Brag's "New England:"

I saw two shooting stars last night
I wished on them but they were only satellites.
It's wrong to wish on space hardware.
I wish, I wish, I wish you'd care.

It may be wrong to wish on them :) but I do find satellites are fun to ponder as part of the dance of chemistry and gravity so far above our heads.

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