Astronomers Find a Third Galaxy Missing Its Dark Matter
9 hours ago
- #galaxy formation
- #astrophysics
- #dark matter
- Astronomers found a galaxy string, including NGC 1052-DF9, lacking dark matter, supporting the 'Bullet Dwarf' collision theory.
- Earlier discoveries of galaxies like NGC 1052-DF2 showed stars moving slowly, contradicting Modified Newtonian Dynamics (MOND) and confirming dark matter as a separable entity.
- The 'Bullet Dwarf' theory explains that high-speed collisions between gas-rich dwarf galaxies strip dark matter, leaving a trail of dark-matter-free galaxies.
- Evidence from Hubble confirmed distances, reinforcing the pattern and challenging alternative explanations for galaxy dynamics.