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Credit & Copyright: Paolo Palma
Explanation:
It's fun to scribble on the
canvas of the sky.
You can use a creative photographic technique to cause
the light of point-like stars to dance across a digital
image by tapping lightly on the telescope while making
an exposure.
The result will be a squiggly line traced by the star (or two
squiggles traced by binary stars) that can reveal the star's color.
Colorful
lines, dubbed Ghirigori,
made from stars found in
the northern sky constellations Bootes,
Corona Borealis, Ophiucus, and Coma Berenices, are captured
in this artistic mosaic.
The 25 stars creating the varied and colorful squiggles
are identified around the border.
Of course, temperature determines
the color of a star.
While whitish stars tend to be close to the Sun's temperature,
stars with bluer hues are hotter, and yellow
and red colors are cooler
than the Sun.
Weekend Watch:
Perseid
Meteor Shower
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: star trail
Publications with words: star trail
See also: