Imagine trying to reconstruct the history of a city by studying only its oldest surviving buildings.
Sandeep K S
Mar 3
1 min read
Exploring Galactic Archaeology: This infographic delves into the ancient structures of the Milky Way, highlighting the role of RR Lyrae variable stars as cosmic lighthouses. It revisits the traditional understanding of galactic formation by suggesting simultaneous layer development of the halo, thick, and thin disks. The Gaia satellite's data aids in mapping a billion stars, offering insights into the Milky Way’s history and its connection with Andromeda.
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.
Look up on a clear night and you'll see the streaks of our modern satellite networks. What you don't see is the growing fallout for the atmosphere that keeps us alive.
A wave of satellite launches and reentries is changing the chemistry and physics of the middle and upper atmosphere. Studies warn of ozone depletion, stratospheric heating, and new metal aerosols from burning spacecraft.
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