What's happening at the center of our galaxy? It's hard to tell with optical telescopes since
visible light is blocked by intervening interstellar dust. In other bands of light, though, such as
radio, the galactic center can be imaged and shows itself to be quite an
interesting and active place. The
featured picture shows the inaugural image of the
MeerKAT array of 64 radio dishes just completed in
South Africa. Spanning four times the angular size of
the Moon (2
degrees), the image is impressively vast, deep, and detailed. Many known sources are shown in clear detail, including many with a prefix of Sgr, since the Galactic Center is in the direction of the
constellation Sagittarius. In our Galaxy's Center lies
Sgr A, found here just to the right of the image center, which houses the Milky Way's central supermassive black hole. Other sources in the image are not as well understood, including the Arc, just to the left of Sgr A, and numerous filamentary threads.
Goals for MeerKAT include searching for radio emission from neutral hydrogen emitted in a much younger universe and brief but distant
radio flashes.
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