A satellite galaxy is a smaller galaxy, typically a dwarf, that is gravitationally bound and orbits a larger host galaxy. These companion galaxies may eventually be tidally disrupted or merge with their hosts, and often contain between a few thousand and a few billion stars.
Source: esa.int

30/06/2025

02/05/2025

31/12/2024

01/11/2024

29/10/2024

02/10/2024

27/09/2024

03/07/2024

02/07/2024

15/03/2024

08/03/2024

27/04/2023