Hubble peered into the core of Messier 105 (also known as NGC 3379) and measured the motions of stars swirling around its center. These observations proved that a supermassive black hole resides at the galaxy’s heart. According to recent estimates, this black hole could be up to 200 million times as massive as our Sun.
NASA, ESA, Karl Gebhardt (University of Michigan), and Tod Lauer (NOAO)
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/nasahubble/37482401952/">https://www.flickr.com/photos/nasahubble/37482401952/</a>; see also <a rel="nofollow" class="external free" href="https://hubblesite.org/contents/news-releases/1997/news-1997-01.html">https://hubblesite.org/contents/news-releases/1997/news-1997-01.html</a>