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The elliptical galaxy NGC 3561B (upper left) and the spiral galaxy NGC 3561A (lower right) form a shimmering guitar shape in the ongoing merger known collectively as Arp 105. Image credit: NASA / ESA / M. West, Lowell Observatory / Gladys Kober, NASA & Catholic University of America.

Hubble Observes Ongoing Merger of Two Massive Galaxies: Arp 105

Mar 10, 2025 by Enrico de Lazaro

Arp 105 is characterized by a tidal tail of stars and gas more than 362,000 light-years long. The elliptical galaxy NGC 3561B (upper left) and the spiral...