A new proposal envisions 1 million satellites orbiting Earth.
Sandeep K S
Feb 19
1 min read
Navigating the Satellite Megaconstellation Crisis: This infographic illustrates the increasing congestion in Earth's orbit, with projections showing a rise from 14,000 active satellites to over 1.2 million. It highlights risks such as visibility interference and collision threats while proposing solutions like multi-stakeholder research and mandatory mitigation strategies to preserve astronomical, environmental, and cultural values.
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.
Far from the warmth of any star, moons orbiting rogue gas giants might harbor oceans of liquid water—and potentially complex life—for billions of years.
Liquid water is considered essential for life. Surprisingly, however, stable conditions that are conducive to life could exist far from any sun.
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