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Archive for the ‘cosmology’ category: Page 18

Apr 17, 2024

Largest 3D map of our universe could ‘turn cosmology upside down’

Posted by in category: cosmology

Scientists using the Dark Energy Spectroscopic Instrument have unveiled the largest 3D map of the universe ever. The results suggest that dark energy, the mysterious force pulling the universe apart, may be weakening, challenging prevailing theories of cosmology.

Apr 17, 2024

Exploding Stars are Rare but Emit Torrents of Radiation—one close enough to Earth could Threaten Life on the Planet

Posted by in categories: cosmology, nuclear energy

Stars like the sun are remarkably constant. They vary in brightness by only 0.1% over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep the sun shining steadily for about 5 billion more years, but when stars exhaust their nuclear fuel, their deaths can lead to pyrotechnics.

The sun will eventually die by growing large and then condensing into a type of star called a white dwarf. But stars more than eight times more massive than the sun die violently in an explosion called a supernova.

Supernovae happen across the Milky Way only a few times a century, and these violent explosions are usually remote enough that people here on Earth don’t notice. For a dying star to have any effect on life on our planet, it would have to go supernova within 100 light years from Earth.

Apr 17, 2024

Second-biggest black hole in the Milky Way found

Posted by in category: cosmology

May help explain why we see so many of these monsters colliding.

Apr 17, 2024

Dark energy could be getting weaker, suggesting the universe will end in a ‘Big Crunch’

Posted by in category: cosmology

I found this on NewsBreak: Dark energy could be getting weaker, suggesting the universe will end in a ‘Big Crunch’


The first year of Dark Energy Spectroscopic Instrument (DESI) data seems to show that dark energy is weakening over time, possibly the biggest cosmological discovery for 25 years.

Apr 17, 2024

Unraveling Dark Energy and Cosmic Expansion With an 11-Ton Time Machine

Posted by in categories: cosmology, mapping, time travel

I found this on NewsBreak: Unraveling Dark Energy and Cosmic Expansion With an 11-Ton Time Machine.

Apr 17, 2024

Most massive stellar black hole in the Milky Way discovered ‘extremely close’ to Earth

Posted by in categories: cosmology, physics

I found this on NewsBreak: Most massive stellar black hole in the Milky Way discovered ‘extremely close’ to Earth.


Astronomers have found the most massive stellar-mass black hole ever discovered in our galaxy — and it’s lurking “extremely close” to Earth, according to new research.

The black hole, named Gaia BH3, is 33 times more massive than our sun. Cygnus X-1, the next-biggest stellar black hole known in our galaxy, weighs only 21 solar masses. The newfound black hole is located roughly 2,000 light-years away in the constellation Aquila, making it the second-closest known black hole to Earth.

Continue reading “Most massive stellar black hole in the Milky Way discovered ‘extremely close’ to Earth” »

Apr 17, 2024

Top Astronomers Gather to Confront Possibility They Were Very Wrong About the Universe

Posted by in category: cosmology

A number of high-profile astronomers are set to convene at London’s Royal Society to question some of the most fundamental aspects of our understanding of the universe.

As The Guardian reports, the luminaries of cosmology will be re-examining some basic assumptions about the universe — right down to the over-a-century-old theory that it’s expanding at a constant rate.

“We are, in cosmology, using a model that was first formulated in 1922,” coorganizer and Oxford cosmologist Subir Sarkar told the newspaper, in an apparent reference to the year Russian astronomer Alexander Friedmann outlined the possibility of cosmic expansion based on Einstein’s general theory of relativity.

Apr 16, 2024

Most massive stellar black hole in our galaxy found

Posted by in category: cosmology

Astronomers have identified the most massive stellar black hole yet discovered in the Milky Way galaxy. This black hole was spotted in data from the European Space Agency’s Gaia mission because it imposes an odd ‘wobbling’ motion on the companion star orbiting it. Data from the European Southern Observatory’s Very Large Telescope (ESO’s VLT) and other ground-based observatories were used to verify the mass of the black hole, putting it at an impressive 33 times that of the sun.

Apr 14, 2024

Stargates: We are fascinated by portals between worlds

Posted by in categories: cosmology, media & arts

Gateways between stars, wormholes through the fabric of reality, but could these be real, and if so, what would the civilizations using them be like?
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Apr 14, 2024

Warp Drives: New Simulations

Posted by in categories: cosmology, mathematics, physics, space travel

Learn more from a science course on Brilliant! First 30 days are free and 20% off the annual premium subscription when you use our link ➜ https://brilliant.org/sabine.

Hyperjumps, wormholes, and warp drives sound like science fiction, but they’re actually based on real science! Though I believe out of the three, warp drives are the most plausible. The math seems to agree. Today I want to tell you about a new way of analysing and visualizing warp drives.

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