News From Terre Haute, Indiana

News Columns

August 11, 2011

MARK BENNETT: This is the perfect time to lie on your back staring at the sky

TERRE HAUTE — August should be national hammock month.

The night sky turns into an astronomical kaleidoscope in the year’s eighth month. And, there is no better way to gaze at it all than supine (flat on your back) in a hammock. No remote control or iPhone is necessary. Humans are powerless to start or stop celestial displays, anyway. Just exhale and look up. The heavens will take care of the rest.

The best moments to be a hammock-bound amateur astronomer arrive during the overnight hours of this Friday and Saturday. That’s when the Perseid meteor shower — the largest and most reliable annual meteor shower — reaches its peak. Thin flares of light streak across the sky, adding movement to the still glow of the stars. On average, 90 meteors per hour are visible, in the right conditions.

“The Perseid is probably the most spectacular and the most famous,” said Richard Ditteon, professor of physics at Rose-Hulman Institute of Technology and director of its Oakley Observatory.

Thus, it’s worth staying up late to see. Brew some coffee. The optimum viewing times for this year’s Perseid are estimated to be around 2 a.m. both nights.

To the first-timer, the term “meteor shower” may conjure images of Armageddon. Rest assured, boulders do not hurtle toward Earth, raining fire down upon us this weekend.

The streaking images during the Perseid are indeed meteors, but as tiny as grains of sand. “If you get a boulder,” Ditteon said of meteor sizes, “you’re going to get something that’s visible [even] in daylight.”

Instead, the August event involves much smaller objects. “What you’re seeing is debris left over from a comet named Swift-Tuttle,” Ditteon explained. “It just so happens, the Earth passes through that debris cloud every August.” The debris from the comet’s tail gets more dense as the planet bisects the middle of the cloud, which is why the monthlong Perseid sparkles brightest in mid-August.

Despite their granular size, those space particles enter Earth’s atmosphere at 40,000 to 50,000 miles per second, burning along the way and then vaporizing. This particular meteor shower gets its name because it appeared to radiate from the constellation Perseus, according to the popular astronomy website www.space.com. In Greek mythology, Perseus beheaded Medusa, whose snake-filled hair was so hideous it turned to stone anyone who laid eyes upon it. Eyeing the Perseid meteor shower involves no such danger. A few tips help, though.

This year’s Perseid peak might be a bit less brilliant because the moon will be full and bright. “That [lunar illumination] makes it more difficult to view the fainter objects,” Ditteon said. Nonetheless, meteor-gazers likely will see more activity than on any other nights in 2011. The ideal locations would be miles from pervasive artificial lights, especially around downtown Terre Haute or commercial areas. “Get as far away from Kmart as you can,” Ditteon said, suggesting spots in the countryside.

Once you’ve chosen a location, look toward the northeast (because they tend to come from that direction), but don’t focus on one point, he added. Rather, stare at the sky as you would the entire field from a top-row seat in a major-league baseball park. Rely on your peripheral vision to spot the meteors, which occur randomly in various parts of the sky and often in bunches. Binoculars make it easier to spot fainter meteors but limit a broader field of view.

Backyard astronomy is tougher in the 21st century because artificial lights are stronger and more prevalent. “That’s one of the bad things about our modern society,” Ditteon said. “We’ve got a lot of light pollution. The average Joes don’t know how beautiful the night sky can be.”

Ditteon has studied space extensively. A native of Anderson, he worked on NASA’s Viking program, which sent an unmanned probe to Mars in the 1970s. He’s taught at Rose-Hulman for more than a quarter-century, and has guided the observatory since the early 1990s. Inside that facility is a Ritchey-Chretien telescope sporting a lens a half-meter in diameter. When the college’s classes resume Sept. 1, Ditteon will be educating young engineers on the activity in space.

For us average Joes, the August meteor shower gives us our astronomy lesson and catches our eyes. (If we keep them open late enough to see it all.) “People are just curious,” Ditteon said of fascination with astral phenomena, such as Perseid. “They want to know what’s going on.”

My layman’s advice — find a hammock and just open those eyelids.

Mark Bennett can be reached at (812) 231-4377 or mark.bennett@tribstar.com.

Text Only | Photo Reprints
News Columns
Latest News
Multimedia
Like us on Facebook!
Community Calendar
Loading…
Events by eviesays.com
TribStar.com Poll
Front page
AP Video
Man Falls Off Crane, Dies After Police Standoff Obama Honors Fallen Troops at Arlington Cemetery Man in Crane at Texas College Says He's Armed Raw Video: Deadly Explosion at Minn. Paper Mill Raw Video: Cop Shoots Man Eating Another's Face Unexpected Smog in Pristine National Parks Air Canada Plane Makes Emergency Landing Dairy Farm Uses Chiropractor to Help Cows Romney Promises World's Strongest Military Russia Condemns Ally Syria Over Massacre of 108 Raw Video: 19 Dead in Qatar Shopping Mall Fire Obama Pays Tribute to Vietnam Veterans Beryl Knocks Out Power in Florida Raw Video: Earthquake Shakes Evacuees in Italy Service Dogs Help Wash. Soldiers Battling PTSD Beryl Makes Landfall on Florida Coast Japan Farmers Plant, Seek Radiation-free Rice Raw Video: Memorial Day Aboard Intrepid Raw Video: Heckler Bursts in on Blair Testimony UN Blames Syrian Forces for Shelling Houla
NDN Video
LeAnn Rimes Rocks Short Shorts Drunk Women Breaking Into Houses: A New Trend? Beyonce Shows Off 60 Pound Weight Loss at Concert Raw Video: Cop Shoots Man Eating Another's Face Gordon Ramsay Carried Off Field Man Dies Getting Lap Dance Bear cools off in Calif. family's pool Kim Kardashian Claims Items Stolen from Her Luggage Ep. 3: Chopped Desserts Air Force dad surprises family at baseball game Justin Bieber Wanted for Questioning for L.A. Scuffle J.Lo and Marc's Friendly Reunion Man Falls Off Crane, Dies After Police Standoff Jet makes emergency landing after debris falls off Raw Video: Deadly Explosion at Minn. Paper Mill Cynthia Nixon Ties the Knot Woman, 80, Falls Out of Skydive Harness Mid-Jump Keira Reveals Engagement Ring Dog runs alonside cyclists for 1,100 miles Lady Gaga Cancels Indonesian Show After Threats
Parade
Magazine

Click HERE to read all your Parade favorites including Hollywood Wire, Celebrity interviews and photo galleries, Food recipes and cooking tips, Games and lots more.
  • -

    March 12, 2010

activity
Real Estate News