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Credit & Copyright: GLIMPSE Team
Explanation:
A recent survey of stars
conducted with the Spitzer
Space Telescope is convincing astronomers that our
Milky Way Galaxy is not just your ordinary
spiral galaxy anymore.
Looking out from within
the Galaxy's disk, the true structure of
the
Milky Way is difficult to discern.
However, the penetrating infrared
census of about 30 million stars indicates that the Galaxy is
distinguished by a very large central bar some 27,000 light-years long.
In fact, from a vantage point that viewed our galaxy face-on,
astronomers in distant galaxies
would likely see a striking barred
spiral galaxy suggested
in this artist's illustration.
While previous investigations have
identified
a small central
barred structure, the new results indicate that the Milky Way's
large bar would make about a 45 degree angle with a line
joining the Sun and the Galaxy's center.
DON'T PANIC ...
astronomers still
place the Sun beyond the central
bar region, about a third of the way in from
the Milky Way's
outer edge.
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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: Milky Way - barred spiral galaxy
Publications with words: Milky Way - barred spiral galaxy
See also:
- APOD: 2023 July 18 Á Milky Way above La Palma Observatory
- APOD: 2023 July 16 Á Meteor and Milky Way over the Alps
- APOD: 2023 July 2 Á Milky Way and Aurora over Antarctica
- APOD: 2023 June 20 Á The Nandu in the Milky Way
- APOD: 2023 May 29 Á Milky Way over a Turquoise Wonderland
- APOD: 2023 May 10 Á Milky Way over Egyptian Desert
- NGC 2442: Galaxy in Volans