While photographing Comet Machholz tonight, my mind wandered back to a 19-year old mystery
While photographing the recently discovered comet
Machholz the other night, Jimmy Westlake's mind wandered back to a mystery
that'd been bugging him for years. On Jan. 1, 1986, he was photographing another
comet, Halley's, through his homemade 8-inch reflecting telescope.
"About one minute into the exposure, I watched a meteor zip through the field
of the telescope," said Westlake, a professor of physical sciences at Colorado
Mountain College in Steamboat Springs, CO. "I stopped the exposure at two minutes."
That night, when he developed the roll of slide film, he was astounded at what
he saw:
"Crossing the tail of Halley's comet was a corkscrew meteor trail with no fewer
than 25 twists in it," he said. "I had read of some meteors appearing to have
curves or kinks in their trails, but I had never seen a photo of one."
It's the picture above, and Halley's comet is the smudge under the corkscrew.
Years later Westlake ran across an old astronomy book by Camille Flammarion
and happened upon a sketch someone had made of a daytime fireball trail that
looked almost exactly like his corkscrew meteor, "including the dark-colored
inner curls," he said.
Westlake's photo was never published until today. He wonders if there are others
out there.
Oh, and that photo he took of comet Machholz the other night? It's pretty nifty,
too. Here it is:

Why is the
comet green?
"The coma
contains cyanogen (CN), a poisonous gas, and diatomic carbon (C2)," says
Tony Phillips in an
article at Science.NASA.gov. "Both of these substances glow
green when illuminated by sunlight."
-- Robert
Roy Britt
Photo Credit: Jimmy Westlake
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