New Theory Explains Unusual Properties of Milky Way's Crater 2 Galaxy

Astrophysicists propose self-interacting dark matter as the key to understanding Crater 2's unique characteristics and origin.

Crater 2, a satellite galaxy of the Milky Way, is located 380,000 light years from Earth.
The galaxy's low density and large size challenge prevailing cold dark matter (CDM) theories.
Researchers suggest self-interacting dark matter (SIDM) better explains Crater 2's properties.
SIDM involves dark matter particles that interact and collide, creating a shallow density core.
This theory aligns with Crater 2's observed orbit and low-density dark matter halo.