Why Does Our Galaxy's Center Look Bright Despite a Black Hole?

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The brightness at the center of our galaxy, despite the presence of a black hole, is attributed to additional matter and energy sources. Matter spiraling into the black hole emits strong radiation, contributing to the observed luminosity. The black hole itself is relatively small compared to the vast scale of the galaxy, with a radius of only a few tens of astronomical units. This size makes it difficult to perceive the black hole directly from Earth. Overall, the combined effects of surrounding matter and radiation explain the bright appearance of the galactic center.
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If there is a black hole at the center of our galaxy, why does the center of our galaxy looks so bright?
 
Astronomy news on Phys.org
1. the black hole is not the only resident
2. matter inspiralling into the central black hole radiates strongly
 
The black hole at the center of our galaxy, despite being massive, is absolutely tiny on the galactic scale. The radius of the black hole in the center of our galaxy is on the order of a couple of tens of AU (1 AU = the distance from the Earth to the sun). Seen from the earth, this is absolutely tiny.
 

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