Astronomy Picture of the Day



The Radio Sky: Tuned to 408MHz

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zorg.ch
#66367 by @ 06.02.2005 00:00 - nach oben -
The Radio Sky: Tuned to 408MHz


Explanation:

Tune
your radio
telescope to 408MHz
(408 million cycles per second) and check out the Radio Sky!

In the 1970s large dish antennas at
three radio observatories,
Jodrell Bank,
MPIfR, and
Parkes Observatory,
were used to do just that -
the data were combined to map the entire sky.
Near this frequency,
cosmic radio waves are generated by high energy electrons spiraling
along magnetic fields.

In the resulting false color image, the galactic plane
runs horizontally through the center, but no
stars are visible.
Instead, many of the bright sources near the plane
are distant pulsars, star forming regions,
and supernova remnants, while the grand
looping structures
are pieces of
bubbles blown by local stellar activity.

External galaxies like
Centaurus A,
located above the plane to the right of center, and
the LMC (below and right)
also shine in the Radio Sky.




Credit & Copyright
zorg.ch
#66419 by @ 06.02.2005 18:42 - nach oben -
mhh, bunt