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Астронет: Астрономическая картинка дня Движение Млечного Пути от "Гайя" http://variable-stars.ru/db/msg/1840335/eng |
Credit & Copyright: ESA,
Gaia,
DPAC;
Text:
Ata Sarajedini
(Florida Atlantic U.,
Astronomy Minute podcast)
Explanation:
Our sky is alive with the streams of stars.
The motions of 26 million
Milky Way stars are evident in the
featured map constructed from recent data taken by
ESA's
Gaia satellite.
Stars colored blue are
moving toward us, while red indicates away.
Lines depict the
motion of the stars across the sky.
The large blue on the left and red areas on the map's right give the overall impression
that stars in the Milky Way are
rotating around the center.
However, there is a region near the middle --
caused by our own
Sun's motion
relative to a rigidly-rotating central
Galactic bar -- that seems to reverse it.
Understanding details about the
motion of stars is
helping humanity to better understand the
complex history of our
Milky Way galaxy
and the origin of
our Sun.
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.