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Archive for the ‘cosmology’ category: Page 29

Jan 12, 2023

Astronomers mapped the magnetic field of the space bubble surrounding us

Posted by in category: cosmology

“Putting together this 3D map of the Local Bubble will help us examine superbubbles in new ways.”

Did you know that we live in a bubble? Sure, some of us do, but we’re talking about another one. An enormous 1,000-light-year-wide “superbubble” called the Local Bubble. Astronomers at the Center for Astrophysics | Harvard & Smithsonian (CfA) have now unveiled a first-of-its-kind map that reveals the bubble’s magnetic field.

Continue reading “Astronomers mapped the magnetic field of the space bubble surrounding us” »

Jan 12, 2023

Cosmic superbubble’s magnetic field charted in 3D for the first time

Posted by in categories: cosmology, evolution

Astronomers at the Center for Astrophysics | Harvard & Smithsonian (CfA) have unveiled a first-of-its-kind map that could help answer decades-old questions about the origins of stars and the influences of magnetic fields in the cosmos.

The map reveals the likely structure of the Local Bubble—a giant, 1,000-light-year-wide hollow in space surrounding our Sun. Like a hunk of Swiss cheese, our galaxy is full of these so-called superbubbles. The explosive supernova deaths of massive stars blow up these bubbles, and in the process, concentrate gas and dust—the fuel for making —on the bubbles’ outer surfaces. These thick surfaces accordingly serve as rich sites for subsequent star and planet formation.

Continue reading “Cosmic superbubble’s magnetic field charted in 3D for the first time” »

Jan 11, 2023

Scientists detect superheavy neutron star that existed for only a fraction of a second

Posted by in categories: computing, cosmology

A mix of computer simulations and gamma-ray burst observations shed new light on merging neutron stars.

Astronomers trawled through archival observations of short gamma-ray bursts (GRBs) and detected the rapid evolution of two merging neutron stars into a superheavy neutron star, which then collapsed into a black hole.

Continue reading “Scientists detect superheavy neutron star that existed for only a fraction of a second” »

Jan 10, 2023

Scientists find pair of black holes dining together in nearby galaxy merger

Posted by in category: cosmology

While studying a nearby pair of merging galaxies using the Atacama Large Millimeter/submillimeter Array (ALMA)—an international observatory co-operated by the U.S. National Science Foundation’s National Radio Astronomy Observatory (NRAO)—scientists discovered two supermassive black holes growing simultaneously near the center of the newly coalescing galaxy.

Jan 9, 2023

Astronomers find a way to detect a bizarre stellar object that exists for just a few milliseconds

Posted by in category: cosmology

A new study finds that giant neutron stars can exist for a few milliseconds in a merger.

Jan 9, 2023

The Universe in 90 minutes: Time, free will, God, & more | Sean Carroll

Posted by in categories: cosmology, neuroscience, quantum physics

Everything you ever wanted to know about parallel universes, time, entropy, free will and more, explained by physicist Sean Carroll.

Up next, Michio Kaku: The Universe in a nutshell (Full Presentation) ► https://youtu.be/0NbBjNiw4tk.

Continue reading “The Universe in 90 minutes: Time, free will, God, & more | Sean Carroll” »

Jan 8, 2023

New measurements support the idea that dark matter doesn’t exist

Posted by in categories: cosmology, particle physics

Despite numerous searches, we have yet to detect dark matter particles.

Jan 7, 2023

Is the Anthropic Principle scientific?

Posted by in category: cosmology

In this video, I explain why the anthropic principle is a good, scientific principle. First I explain the difference between the strong and the weak anthropic principle. Then I name some examples of the use of the weak anthropic principle and explain its relation to the multiverse. Finally I explain that the weak anthropic principle is merely a constraint on the laws of nature.

Support me on Patreon: https://www.patreon.com/Sabine

Jan 7, 2023

Could humans use black holes to time travel?

Posted by in categories: cosmology, space travel, time travel

Black holes form natural time machines that allow travel to both the past and the future. But don’t expect to be heading back to visit the dinosaurs any time soon.

At present, we don’t have spacecraft that could get us anywhere near a black hole. But, even leaving that small detail aside, attempting to travel into the past using a black hole might be the last thing you ever do.

Jan 7, 2023

The Universe’s End: How Black Holes Perish

Posted by in category: cosmology

Black holes are areas of space-time where gravity rules supreme: A black hole’s gravitational pull is so strong that nothing, not even light, can escape. They range in size from stellar-mass black holes, whose masses can range from five to 100 times that of the Sun, to supermassive black holes, whose masses can exceed a billion solar masses. Astronomers now believe that supermassive black holes exist at the center of most galaxies. (A notable exception to this rule is M33, which appears to lack a central supermassive black hole despite being the third largest member of our Local Group.)

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