标签： 塞弗特星系

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M88

2022年12月28日 Messier 88 Image Credit & Copyright: Adam Block, Mt. Lemmon SkyCenter, U. Arizona Explanation: Charles Messier described the 88th entry in his 18th century catalog of Nebulae and Star Clusters as a spiral nebula without stars. Of course the gorgeous M88 is now understood to be a galaxy full of stars, gas, and dust, not unlike our own Milky W...

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哈勃影像：邻近的螺旋星系NGC 5643

2020年10月5日 NGC 5643: Nearby Spiral Galaxy from Hubble Image Credit: ESA/Hubble & NASA, A. Riess et al.; Acknowledgement: Mahdi Zamani Explanation: What’s happening at the center of spiral galaxy NGC 5643? A swirling disk of stars and gas, NGC 5643’s appearance is dominated by blue spiral arms and brown dust, as shown in the featured image ta...