Siege hublot au-dessus de la Baie d'Hudson
Image Credit &
Copyright:
Ralf Rohner
On the August 18 night flight from San Francisco to Zurich,
a window seat offered this tantalizing view when
curtains
of light draped a colorful glow across the sky over Hudson Bay.
Constructed by digitally stacking six short exposures made with a
hand held camera, the scene records the shimmering aurora borealis
or northern lights
just as the approaching high altitude sunrise illuminated
the northeastern horizon.
It also caught
the flash of a Perseid meteor
streaking beneath the handle stars of the Big Dipper
of the north.
A few days past the meteor shower's peak, its trail still points
across the sky toward Perseus.
Beautiful aurorae and shower meteors both occur in
Earth's upper atmosphere
at altitudes of
100 kilometers or so, far above commercial airline flights.
The aurora are caused by energetic charged particles
from the magnetosphere, while meteors are trails of
comet dust.