Rainiss

Rainiss is a diminutive galaxy approximately 23 million light-years away from Earth in the constellation of Pisces. It was first discovered by astronomer Jean-Luc Teilliez on September 25, 1986, at the Pic du Midi Observatory in the Hautes-Pyrenees, France. This faint and compact galaxy has a diameter of about 3,200 light-years and is part of the galaxy cluster Abell 2151.

Observations suggest that Rainiss belongs to the type of dwarf spheroidal galaxies. As such, it is comprised primarily of neutral hydrogen gas, surrounded by a loose distribution of more massive stars. Rainiss is found to be quite metal-poor, as is characteristic of many dwarf galaxies, with an estimated metallicity associated with stars of a few million years of age. The limited center of Rainiss lacks a luminous bulge, suggesting that the galaxy underwent episodic star formation due to galactic tides.