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Creator:Legacy Astronomical Images Series:Active Galactic Nuclei Series Unit:Seyferts Unit Type:Legacy Astronomical Image |
Description:An optical image in H-alpha light of the central part of NGC 4258, which shows jet-like structures emerging from the core on a scale of a kiloparsec (3260 light-years). The inset shows the newly discovered molecular disk that contains water vapor masers. Their velocities are color coded (blue for approaching, red for receding and green for stationary with respect to the galaxy) and define nearly perfect Keplerian motion around an unseen object of 40 million solar masses. [show more]
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