Recent Entries

“Umbrellas of Stars'” –A Dwarf Galaxy Crashed Broadside Into Milky Way 2.7 Billion Years Ago

 

Nyx --"A Vast Alien Star Stream Observed Near the Sun"

 

In 2018, an international team of astronomers proposed that around 8 billion to 10 billion years ago an unknown massive dwarf galaxy dubbed the “Sausage” –with a total mass in gas, stars and dark matter more than 10 billion times our sun– crashed head-on into our Milky Way galaxy, ripping the dwarf to shreds, leaving its stars moving in long, narrow needle-like radial orbits. This defining event in the early history of the Milky Way reshaped the structure of our galaxy into its warped, twisted shape shown above, with the Sausage debris scattered around the inner parts of the Milky Way, creating the ‘bulge’ at the galaxy’s center and the surrounding ‘stellar halo.’

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Mystery of Milky Way’s Halo –“Hiding Missing Matter from Birth of the Universe”

Mystery of Milky Way's Halo --"Hiding Matter Missing from Birth of the Universe"

 

Our home galaxy, the Milky Way, is only one of a 150 billion galaxies visible to our telescopes, and, like all galaxies, is cloaked in a huge halo, that itself enshrouds a mystery. In 2018, HaloSat, a minisatellite designed to probe at the X-rays emitted by the Milky Way’s heated halo, the circumgalactic medium (CGM), was launched into space to search for atomic remnants of the leftover baryonic matter –believed to be missing since the universe’s birth nearly 14 billion years ago.

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Planet Earth Report –“The Pandemics ‘Holy Grail’ to Hunt for Alien Civilizations Zeroes In On One Star”

Earth from the ISS

 

Planet Earth Report” provides descriptive links to headline news by leading science journalists about the extraordinary discoveries, technology, people, and events changing our knowledge of Planet Earth and the future of the human species.

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Last Week’s Top 5 Space & Science Headlines –“Earth’s ‘Last Creature’ to Fathomless Dark Creations of the Universe”

 

ESO VLT

 

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“Ten One-Billionths of Cosmic History” –Past Homo Species Could Not Survive Intense Climate Change

"Ten One-Billionths of Cosmic History" --Past Homo Species Could Not Survive Intense Climate Change

 

The human experience on our pale blue dot “has lasted for less than 10 one-billionths of cosmic history surrounded by a vast lifeless space, yet we humans are congratulating ourselves,” says Peter Brannen author of Ends of the World about the current reign of humans recently named the Anthropocene –the period dating from the Atomic Age of the 1950s during which human activity has been the dominant influence on climate and the environment– “on an unearned geological legacy before we’ve proved ourselves capable of escaping the next century with our lives. And, besides, most of our proudest creations—whole cities and manufactured landscapes—will be destroyed by the ceaseless destruction of tectonics and erosion…many of the synthetic markers proposed to delineate the Anthropocene will not survive the insults of deep time.”

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Planet Earth Report –“The Supermassive-Milky Way Experiment Nobody Thought Would Work to a Prior Universe”

 

Earth from the ISS

 

“Planet Earth Report” provides descriptive links to headline news by leading science journalists about the extraordinary discoveries, technology, people, and events changing our knowledge of Planet Earth and the future of the human species.

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“Soon to be Revealed” –Hidden Galaxies of the Early Universe

 

Quasar Hubble

 

“Hubble simply doesn’t go far enough into the infrared” to see the hidden galaxies of the early universe, said Rogier Windhorst of Arizona State University, co-author of a new study using the near-infrared capabilities of NASA’s Hubble Space Telescope to probe known quasars, ‘quasi-stellar radio sources’,  in hopes of spotting the surrounding glow of their host galaxies, without significant detections, suggesting that cocoons of dust that absorb visible light within the galaxies is obscuring the light of their stars.

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“Who Knows What Else is Out There” –Glow Shields Earth’s ‘Last Creature’ from Deadly Radiation

tardigrade

 

It’s been said that the tardigrade, an eight-legged microscopic creature –the most resilient form of life on our planet, that can exist for up to 30 years without food or water and endure temperature extremes up to 150 degrees Celsius– will exist until the Sun dies.

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