Year 2013 face_with_colon_three
Francisco José Soler Gil, Manuel Alfonseca, Fine Tuning Explained? Multiverses and Cellular Automata, Journal for General Philosophy of Science / Zeitschrift für allgemeine Wissenschaftstheorie, Vol. 44, No. 1 (July 2013), pp. 153–172.
Scientists find traces of black holes from other universes in the night sky. This shows that there have been other universes.
New Scientist says that the idea is based on a thing called “conformal cyclic cosmology” (CCC). It means that our universe didn’t start with a single Big Bang. Instead, it goes through cycles of Big Bangs and shrinking.
Even though most of the universe would be destroyed from one cycle to the next, these scientists say that some electromagnetic radiation might make it through the process. Their research results have been posted on arXiv.
Scientists have advanced in discovering how to use ripples in space-time known as gravitational waves to peer back to the beginning of everything we know. The researchers say they can better understand the state of the cosmos shortly after the Big Bang by learning how these ripples in the fabric of the universe flow through planets and the gas between the galaxies.
“We can’t see the early universe directly, but maybe we can see it indirectly if we look at how gravitational waves from that time have affected matter and radiation that we can observe today,” said Deepen Garg, lead author of a paper reporting the results in the Journal of Cosmology and Astroparticle Physics. Garg is a graduate student in the Princeton Program in Plasma Physics, which is based at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL).
Garg and his advisor Ilya Dodin, who is affiliated with both Princeton University and PPPL, adapted this technique from their research into fusion energy, the process powering the sun and stars that scientists are developing to create electricity on Earth without emitting greenhouse gases or producing long-lived radioactive waste. Fusion scientists calculate how electromagnetic waves move through plasma, the soup of electrons and atomic nuclei that fuels fusion facilities known as tokamaks and stellarators.
Circa 2014 face_with_colon_three
Researchers spar over the meaning of findings and the precise timing of doomsday clock.
A clock near a black hole will tick very slowly compared to one on Earth. One year near a black hole could mean 80 years on Earth.
The new image reveals thin tendrils and clumpy clouds associated with hydrogen gas filling the space between the stars. We can see sites where new stars are forming, as well as supernova remnants.
In just this small patch, only about 1 percent of the whole Milky Way, we have discovered more than 20 new possible supernova remnants where only 7 were previously known.
These discoveries were led by PhD student Brianna Ball from Canada’s University of Alberta, working with her supervisor, Roland Kothes of the National Research Council of Canada, who prepared the image. These new discoveries suggest we are close to accounting for the missing remnants.
Reports that the James Webb Space Telescope killed the reigning cosmological model turn out to have been exaggerated. But astronomers still have much to learn from distant galaxies glimpsed by Webb.
Papers:
Black Hole Energy.
Penrose process for a charged black hole in a uniform.
magnetic field https://arxiv.org/pdf/2106.15010.pdf.
Interactions with cosmic rays could make low-mass dark matter particles detectable by neutrino observatories. But an analysis of two decades’ worth of data shows no signs of the particles.
One question for Paul Sutter, author of “The Remarkable Emptiness of Existence,” an article in Nautilus this month. Sutter is a theoretical cosmologist at the Institute for Advanced Computational Science at Stony Brook University, where he studies cosmic voids, maps the leftover light from the big bang, and develops new techniques for finding the first stars to appear in the cosmos.
What is our universe expanding into?
That’s a great question. The answer, though, is that it’s not a great question. It’s a little tricky, so let me walk you through it. Yes, our universe is expanding. Our universe has no center and no edge. The Big Bang didn’t happen in one location in space. The Big Bang happened everywhere in the cosmos simultaneously. The Big Bang was not a point in space. It was a point in time. It exists in all of our paths.
