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Астронет: Астрономическая картинка дня Следы звезд на северном небе http://variable-stars.ru/db/msg/1165184/eng |
Credit & Copyright: David Malin
Explanation:
As the
Earth spins on its axis,
the sky seems to rotate around us.
This motion produces the beautiful concentric trails traced
by the stars in this time exposure of the night sky.
In the middle of the picture is the
North Celestial Pole (NCP), easily identified as
the point in the sky at the center of all the star trail arcs.
The very short bright trail
near the NCP was made by the
star Polaris,
commonly known as
the North Star.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.