Tag: Galaxies
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James Webb vs Hubble: Which Space Telescope Truly Changed Astronomy?
Introduction: Two Milestones in Space Observation The James Webb Space Telescope (JWST) and the Hubble Space Telescope have both reshaped our understanding of the universe, but they do so in different ways. Hubble, launched in 1990, has been the workhorse of visible-light astronomy for over three decades. James Webb, launched more recently, is designed to…
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Black Hole Stars in Galaxy Cores: A New Cosmic Hint
What are black hole stars? A recent study by an international team of astronomers raises the provocative idea that some galaxy centers might host a rare class of objects termed “black hole stars.” In simple terms, these would be compact stellar configurations living in the extreme gravity near supermassive black holes at galactic cores. While…
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Possible Black-Hole Stars at Galaxy Centers Revealed by New Study
Introduction: a tantalizing hint from the hearts of distant galaxies A new study proposes the existence of a novel class of objects—what researchers are calling black-hole stars—at the centers of some distant galaxies. The claim, based on careful analysis of high-resolution data from modern observatories, suggests that unusual stellar dynamics and compact sources near galactic…
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Potential Smoking Gun Signatures Of Supermassive Dark Stars Found In JWST Data
JWST data fuel new clues about the universe’s first stars The James Webb Space Telescope (JWST) is helping astronomers push the boundaries of the early universe. A team led by Cosmin Ilie of Colgate University, with collaborators Shafaat Mahmud, Jillian Paulin, and Katherine Freese, reports four extremely distant objects whose spectra and shapes align with…
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Hydrogen Bridge Between Dwarf Galaxies: NGC 4532 and DDO 137
A Cosmic Bridge Revealed in the Virgo Sky In a discovery that reads like astrophysical folklore, an international team using the ASKAP radio telescope as part of the WALLABY survey has mapped a colossal structure: a neutral hydrogen bridge linking two dwarf galaxies, NGC 4532 and DDO 137, at a distance of about 53 million…
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Giant Neutral Hydrogen Bridge Between Dwarf Galaxies NGC 4532 and DDO 137
Introduction: A Cosmic Jet Between Dwarf Galaxies In a landmark discovery, astronomers have revealed a colossal structure of neutral hydrogen that stretches between two nearby dwarf galaxies, NGC 4532 and DDO 137. Located about 53 million light-years from Earth, this bridge of gas is not only immense in its length but also unusual in its…
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Radio-bright Galaxies Could Harbor Advanced Civilizations
Introduction: A New Way to Look for Extraterrestrial Intelligences For decades, researchers have scanned the cosmos for signs of intelligent life using radio waves and other technosignatures. A watershed moment came with Breakthrough Listen, a multi-observatory effort that expanded the search for artificial transmissions beyond the Milky Way into the broader universe. The latest work…
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Radio-bright Galaxies Could Host Advanced Civilizations
Introduction: A fresh angle for SETI For decades, the Search for Extraterrestrial Intelligence (SETI) has scanned the cosmos for signs that civilizations beyond Earth broadcast across the radio spectrum. From the first listening experiments in the 1960s to the Breakthrough Listen initiative that began in 2016, researchers have sought both publicized signals and subtle technosignatures.…
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Galaxies with High Radio Emissions Could be Home to Many Advanced Civilizations
Can the radio glow of a galaxy reveal alien civilizations? For decades, humanity has peered into the cosmos in search of signs that we are not alone. From the early days of Project Ozma to the expansive Breakthrough Listen initiative, scientists have listened for artificial radio broadcasts among the stars. A recent study in the…
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Flagship 2: The Largest Universe Simulation Ever Unveiled
Introduction to Flagship 2 In a groundbreaking achievement, scientists have unveiled Flagship 2, the largest universe simulation ever created, boasting an astounding 3.4 billion galaxies. This monumental simulation is crucial for preparing for the analysis of data from the Euclid space telescope, which has been meticulously mapping galaxies and studying the enigmatic forces of dark…