A galaxy made of 99% dark matter, betraying its presence only by four tiny clusters of stars.
Sandeep K S
Feb 19
1 min read
Unveiling Galaxy CDG-2: This infographic details a "dark" galaxy where 99% of its mass is invisible dark matter. Stripped of star-forming gas and with a sparse stellar population, CDG-2 was detected using globular clusters as tracers. It is the first galaxy discovered solely via clusters, with its existence confirmed by data from Hubble, the Euclid space observatory, and the Subaru Telescope.
What if a galaxy could exist without the brilliant stars that normally make galaxies visible? Cloud-9 may offer astronomers one of the most intriguing examples yet. Located near the spiral galaxy M94,
What if a galaxy could exist without the brilliant stars that normally make galaxies visible? Cloud-9 may offer astronomers one of the most intriguing examples yet. Located near the spiral galaxy M94, this mysterious hydrogen-rich object appears to contain enormous amounts of gas while producing almost no detectable starlight.
Astrophysicists have completed ASTRID, the largest cosmological hydrodynamic simulation ever run, tracing the universe from the cosmic dawn ($z=99$) down to the present day ($z=0$). By resolving 166 billion particles across 815 million light-years, ASTRID unveils how supermassive black holes co-evolve with galaxies and sculpt the cosmic web.
Scientists have uncovered the first robust evidence of a black hole and neutron star crashing together while orbiting in an oval path, challenging long-standing assumptions about cosmic pair formation.
Most neutron star-black hole pairs are expected to adopt circular orbits long before merging, their orbits slowly rounded out by the constant emission of gravitational waves over millions of years.
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