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--- transportation:space [2026/03/03 22:10] – [Star / Stars] timb
+++ transportation:space [2026/03/09 21:09] (current) – [Black Hole] timb
@@ Line 1482: / Line 1482: @@
 https://gizmodo.com/that-black-hole-merger-that-shouldnt-exist-scientists-propose-a-wild-explanation-2000684803
+== Scientists Just Doubled Our Catalog of Black Hole and Neutron Star Collisions ==
+Posted by EditorDavid on Sunday March 08, 2026 09:34PM
+Colliding black holes were detected through spacetime ripples for the first time in 2015 by the Laser Interferometer Gravitational-Wave Observatory (LIGO), notes Space.com:
+<blockquote>
+Since then, LIGO and its partner gravitational wave detectors Virgo in Italy and KAGRA (Kamioka Gravitational Wave Detector) in Japan have detected a multitude of gravitational waves from colliding black holes, merging neutron stars, and even the odd "mixed merger" between a black hole and a neutron star... During the first three observing runs of LIGO, Virgo and KAGRA, scientists had only "heard" 90 potential gravitational wave sources.
+</blockquote>
+But now they've published new data from the LIGO-Virgo-KAGRA (LVK) Collaboration that includes 128 more gravitatational wave sources — some incredibly distant:
+https://science.slashdot.org/story/26/03/09/0429200/scientists-just-doubled-our-catalog-of-black-hole-and-neutron-star-collisions
@@ Line 2906: / Line 2921: @@
 https://science.slashdot.org/story/25/03/22/0414254/surprisingly-some-dyson-spheres-and-ringworlds-can-be-stable
+== If Alien Dyson Spheres Are Real, These Are the Stars They’d Pick ==
+Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?
+Gayoung Lee - March 4, 2026
+Assuming aliens do physics like us but are actually much better at it, perhaps they would identify a way to directly harness a star’s energy output—instead of, say, attempting to replicate stellar dynamics and confining it in some pressurized power plant. As speculative new research suggests, aliens might want to build their star-powered energy farms around a certain kind of star.
+We’re talking about Dyson spheres. Physicist Freeman Dyson proposed this super-futuristic concept—a vast swarm of structures orbiting a star to harvest its energy. In the new work, accepted for publication in the journal Universe, astronomer Amirnezam Amiri of the University of Arkansas presented a theoretical calculation of Dyson spheres around low-mass stars. The paper, currently available as a preprint on arXiv, assessed the feasibility of a Dyson sphere around white or red dwarfs and, if so, what an outside observer would see.
+https://gizmodo.com/if-alien-dyson-spheres-are-real-these-are-the-stars-theyd-pick-2000729692
@@ Line 4298: / Line 4329: @@
-===== Alaska =====
-== A Meteorite From Alaska Challenges Theory of How Earth Got Its Water ==
-Scientists speculate that asteroids colliding with Earth delivered water—an essential building block of life—but new research suggests the planet didn't need the delivery.
-Margherita Bassi - April 19, 2025
-Water is essential to life as we know it, but scientists are still unsure about how it originated on Earth. One theory is that asteroids express-shipped us hydrogen, essential to the formation of water molecules, by colliding with our planet in its early history. New research, however, suggests Earth already had enough hydrogen of its own, thank you very much.
-Researchers in the UK discovered previously unknown quantities of hydrogen in a type of meteorite called an enstatite chondrite. I know what you’re thinking: What does hydrogen on a meteorite have to do with the origin of water on Earth? The composition of enstatite chondrite meteorites closely resembles that of Earth 4.55 billion years ago. So if the meteorite has its own source of hydrogen, then early Earth likely did, too—meaning it could have produced water without the help of foreign emissaries.
-“A fundamental question for planetary scientists is how Earth came to look like it does today. We now think that the material that built our planet–which we can study using these rare meteorites–was far richer in hydrogen than we thought previously,” James Bryson of the University of Oxford’s Department of Earth Sciences said in a university statement. “This finding supports the idea that the formation of water on Earth was a natural process, rather than a fluke of hydrated asteroids bombarding our planet after it formed.”
-https://gizmodo.com/a-meteorite-from-alaska-challenges-theory-of-how-earth-got-its-water-2000590233
-===== Antarctica =====
-== Meteorite Hunters Find 17-Pound Space Rock in Antarctica ==
-The team found five meteorites during their recent expedition. The rocks are now headed to a museum for study.
-Kevin Hurler - 18 January 2023
-Researchers combing the surface of Antarctica for space rocks hit the jackpot by finding five meteorites in the tundra, one of which weighs almost 17 pounds.
-The expedition team found the meteorites sitting on top of the snow in Antarctica, where the rocks’ black bodies stuck out against the white snow fields of the continent. Antarctica is an ideal place to find relatively undisturbed space rocks, since its dry climate prevents excess weathering over time. Maria Valdes, a research scientist with the Field Museum and the University of Chicago, and her team found a total of five meteorites during their hunt in December, one of which weighs 16.7 pounds (7.6 kilograms).
-https://gizmodo.com/17-pound-meteorite-found-antarctica-1850000562
-===== Australia =====
-== Huge Impact Crater in Australia Breaks Record for World’s Oldest by Over a Billion Years ==
-A rocky stretch in Western Australia's Pilbara, near Earth's earliest-confirmed lifeforms, was hit by a meteorite about 3.5 billion years ago.
-Isaac Schultz - March 6, 2025
-Scientists in Australia say they’ve found the world’s oldest impact crater, surpassing the previous record-holder’s age by more than 1.25 billion years.
-The meteorite impact—in Western Australia’s Pilbara region—dates back 3.5 billion years, while the former record-holding impact crater is just 2.2 billion years old. By far, the Pilbara crater is the oldest known on Earth, the researchers say, and they managed to find it thanks to a distinctive rock formation. The team’s findings are published today in Nature Communications.
-“This study provides a crucial piece of the puzzle of Earth’s impact history and suggests there may be many other ancient craters that could be discovered over time,” said Tim Johnson, a geologist at Curtin University in Australia and co-lead author of the study, in a university release.
-The distinctive rocks that helped researchers identify the crater are called shatter cones, and they only form in the extreme environment caused by a meteorite impact. The space rock hit an area now known as the North Pole Dome, in a part of the Pilbara about 25 miles (40 kilometers) west of Marble Bar in Western Australia. The now second-oldest-known crater is also in Western Australia, at Yarrabubba.
-https://gizmodo.com/huge-impact-crater-in-australia-breaks-record-for-worlds-oldest-by-over-a-billion-years-2000572516
@@ Line 4476: / Line 4450: @@
 https://science.slashdot.org/story/25/01/18/0044243/meteorite-crash-in-canada-is-caught-by-home-security-camera
+===== Alaska =====
+== A Meteorite From Alaska Challenges Theory of How Earth Got Its Water ==
+Scientists speculate that asteroids colliding with Earth delivered water—an essential building block of life—but new research suggests the planet didn't need the delivery.
+Margherita Bassi - April 19, 2025
+Water is essential to life as we know it, but scientists are still unsure about how it originated on Earth. One theory is that asteroids express-shipped us hydrogen, essential to the formation of water molecules, by colliding with our planet in its early history. New research, however, suggests Earth already had enough hydrogen of its own, thank you very much.
+Researchers in the UK discovered previously unknown quantities of hydrogen in a type of meteorite called an enstatite chondrite. I know what you’re thinking: What does hydrogen on a meteorite have to do with the origin of water on Earth? The composition of enstatite chondrite meteorites closely resembles that of Earth 4.55 billion years ago. So if the meteorite has its own source of hydrogen, then early Earth likely did, too—meaning it could have produced water without the help of foreign emissaries.
+“A fundamental question for planetary scientists is how Earth came to look like it does today. We now think that the material that built our planet–which we can study using these rare meteorites–was far richer in hydrogen than we thought previously,” James Bryson of the University of Oxford’s Department of Earth Sciences said in a university statement. “This finding supports the idea that the formation of water on Earth was a natural process, rather than a fluke of hydrated asteroids bombarding our planet after it formed.”
+https://gizmodo.com/a-meteorite-from-alaska-challenges-theory-of-how-earth-got-its-water-2000590233
+===== Antarctica =====
+== Meteorite Hunters Find 17-Pound Space Rock in Antarctica ==
+The team found five meteorites during their recent expedition. The rocks are now headed to a museum for study.
+Kevin Hurler - 18 January 2023
+Researchers combing the surface of Antarctica for space rocks hit the jackpot by finding five meteorites in the tundra, one of which weighs almost 17 pounds.
+The expedition team found the meteorites sitting on top of the snow in Antarctica, where the rocks’ black bodies stuck out against the white snow fields of the continent. Antarctica is an ideal place to find relatively undisturbed space rocks, since its dry climate prevents excess weathering over time. Maria Valdes, a research scientist with the Field Museum and the University of Chicago, and her team found a total of five meteorites during their hunt in December, one of which weighs 16.7 pounds (7.6 kilograms).
+https://gizmodo.com/17-pound-meteorite-found-antarctica-1850000562
+===== Australia =====
+== Huge Impact Crater in Australia Breaks Record for World’s Oldest by Over a Billion Years ==
+A rocky stretch in Western Australia's Pilbara, near Earth's earliest-confirmed lifeforms, was hit by a meteorite about 3.5 billion years ago.
+Isaac Schultz - March 6, 2025
+Scientists in Australia say they’ve found the world’s oldest impact crater, surpassing the previous record-holder’s age by more than 1.25 billion years.
+The meteorite impact—in Western Australia’s Pilbara region—dates back 3.5 billion years, while the former record-holding impact crater is just 2.2 billion years old. By far, the Pilbara crater is the oldest known on Earth, the researchers say, and they managed to find it thanks to a distinctive rock formation. The team’s findings are published today in Nature Communications.
+“This study provides a crucial piece of the puzzle of Earth’s impact history and suggests there may be many other ancient craters that could be discovered over time,” said Tim Johnson, a geologist at Curtin University in Australia and co-lead author of the study, in a university release.
+The distinctive rocks that helped researchers identify the crater are called shatter cones, and they only form in the extreme environment caused by a meteorite impact. The space rock hit an area now known as the North Pole Dome, in a part of the Pilbara about 25 miles (40 kilometers) west of Marble Bar in Western Australia. The now second-oldest-known crater is also in Western Australia, at Yarrabubba.
+https://gizmodo.com/huge-impact-crater-in-australia-breaks-record-for-worlds-oldest-by-over-a-billion-years-2000572516
+===== Brazil =====
+== 6-Million-Year-Old Meteorite Strike Created a Massive Field of Natural Glass in Brazil ==
+The crater left behind from the impact has yet to be found.
+Passant Rabie - March 4, 2026
+Scientists uncovered a vast field of tektites in Brazil—a rare type of natural glass forged in the aftermath of meteorite impacts.
+The field stretches across 560 miles (900 kilometers) and dates back to a massive impact that took place around 6.3 million years ago. An international team of researchers collected around 500 of the newly discovered specimens, which were named geraisites after the state of Minas Gerais, where they were first found. Prior to this discovery, there were only a handful of known tektite fields on Earth.
+The findings are detailed in a study published in Geology and help fill in the gaps of South America’s ancient impact history. The researchers, however, are still searching for the crater.
+https://gizmodo.com/6-million-year-old-meteorite-strike-created-a-massive-field-of-natural-glass-in-brazil-2000729464
 ===== Mining =====