Io, Jupiter’s Exploding Moon: Unique in the Milky Way?

Jupiter's moon Io

 

In February 2001, an eruption from the Surt volcano on the hellscape of Jupiter’s moon, Io, the volcanic epi-center of our solar system, exploded with an estimated output of an almost incomprehensible 78,000 gigawatts. By comparison, the 1992 eruption of Mount Etna, Sicily, was estimated at 12 gigawatts. During its peak, observed by the WM Keck II Telescope on Hawaii, its output almost matched the eruptive power of all of Io’s active volcanoes combined.

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The Fermi Paradox Revisited and Resolved?

"Unvisited" --Earth May Exist in a Galaxy of Interstellar Space-Faring Civilizations (Weekend Feature)

 

In February 2020, four distinguished astrophysicists —Jonathan Carroll-Nellenback, Adam Frank, Jason Wright, Caleb Scharfsuggested that Earth may have remained unvisited by space-faring civilizations all the while existing in a galaxy of interstellar civilizations seeded by moving stars that spread alien life, offering a solution to the perplexing Fermi paradox. They concluded that a planet-hopping civilization could populate the Milky Way in as little as 650,000 years.

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Massive Black Holes Existed Before the First Stars of the Universe

Supermassive Black Holes

 

The discovery of black holes was the first collision of quantum gravity with general relativity. In 2019, astrophysicists at Ontario’s Western University found evidence for the direct formation of black holes that do not need to emerge from a star remnant. The production of black holes in the early universe, formed from massive seeds aided by gravitational fields soon after the Big Bang, provide scientists with an explanation for what appeared to be the anomaly of extremely massive black holes at a very early stage in the history of our universe.

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Andromeda’s Orbiting Dwarf Galaxies – “Point to Something Profound”

Andromeda Galaxy

 

A string of 13 dwarf galaxies in orbit around the massive galaxy Andromeda –remnants of the population of primordial structures that coalesced to form giant galaxies like the Milky Way–are spread across a flat plane more than one million light years wide and only 30,000 light years thick –a distance so vast that they have yet to complete a single orbit. The 2016 discovery suggests that conventional ideas regarding the formation of galaxies are missing something fundamental.

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Radio Galaxies of the Early Universe -Would Take Several Million Years to Cross at Speed of Light

 

Radio Galaxy

 

“When we look far into the distant universe, we are observing objects way in the past – when they were young. We expected to find that these distant giants would appear as a comparatively small pair of vague lobes. To our surprise, we found that these giants still appear enormous even though they are so far away,” said astrophysicist Michael D. Smith at University of Kent. Conventional wisdom tells us that large objects appear smaller as they get farther from us, but this fundamental law of classical physics is reversed when we observe the distant universe.

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Humans are the Mind of the Cosmos to The Unnerving Origin of Technosignatures (Heard in the Milky Way)

 

ESO Observatories

 

This week’s “Heard in the Milky Way” offers audio and video talks and interviews with leading astronomers and astrophysicists that range from Would Data from an Alien Intelligence be Lethal for Us to Neal Stephenson on  Sci-Fi, Space, Aliens, AI and the Future of Humanity to Is Alien Life Weirder than We Think, and much more. This new weekly feature, curated by The Daily Galaxy editorial staff, takes you on a journey with stories that change our knowledge of Planet Earth, our Galaxy, and the vast Cosmos beyond.  Highly recommended for insomniacs.

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