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Category: cosmology – Page 195
An expanding universe is simulated in a quantum droplet
Unfortunately for the field of cosmology, there is only one universe. This makes performing experiments in the same way as other scientific fields quite a challenge. But it turns out that the universe and the quantum fields that permeate it are highly analogous to quantum fluids like Bose-Einstein condensates (BECs), at least from a mathematical point of view. These fluids can be the subject of experiments, allowing cosmology to be studied in the lab.
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In a paper published in Nature, researchers at Heidelberg University in Germany have for the first time used a BEC to simulate an expanding universe and certain quantum fields within it. This allows for the study of important cosmological scenarios. Not only is the universe currently expanding, but it is believed that in the first fractions of a second after the Big Bang it underwent a period of extremely rapid expansion known as “inflation.” This process would have expanded the microscopic fluctuations of quantum fields in the early universe to the size of galaxy clusters, seeding the large-scale structure of our universe today.
186,100 miles per second!!! Is black hole propulsion possible?
It’s time to explore what might be the ultimate starship! The Kugelblitz Black Hole Starship! Can you really create an artificial black hole? If so, how much energy would it generate, and how fast could it propel a ship across he galaxy? The answers are simply mind-blowing.
#space #blackhole #interstellar.
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Are We The Creation Of A Type V Civilization? | Unveiled
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Did an advanced civilization exist before us? Could they have CREATED us?? In this video, Unveiled takes a closer look at the idea that humankind is actually built be a HIGHER POWER… that we’re really controlled by a force that’s beyond our recognition… and finds out what it could mean for the future of our species!
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Research team finds indirect evidence for existence of dark matter surrounding black holes
Dark matter does not emit or reflect light, nor does it interact with electromagnetic forces, making it exceptionally difficult to detect. Nevertheless, a research team from The Education University of Hong Kong (EdUHK) has proven that there is a substantial amount of dark matter surrounding black holes. The study results are published in the journal The Astrophysical Journal Letters.
The team selected two nearby black holes (A0620-00 and XTE J1118+480) as research subjects, with both considered as binary systems. That is, each of the black holes has a companion star orbiting it. Based on the orbits of the companion stars, observations indicate that their rates of orbital decay are approximately one millisecond (1ms) per year, which is about 50 times greater than the theoretical estimation of about 0.02ms annually.
To examine whether dark matter exists around black holes, the EdUHK team applied the “dark matter dynamical friction model”—a theory widely held in academia—to the two chosen binary systems, through computer simulations. The team found that the fast orbital decay of the companion stars precisely matches the data observed.
China to launch lobster eye-like X-ray astronomical satellite this year
It’s called the Einstein Probe and it’s meant to observe the changing universe.
China has ambitious plans to launch a new X-ray astronomical satellite called the Einstein Probe (EP) at the end of this year. This is according to a report by the ChinaDaily.
“The satellite has entered the final stage of development,” he said at the recent 35th National Symposium on Space Exploration.
EP will have many missions, including capturing the first light from supernova explosions, helping search for gravitational wave sources, and observing the transient phenomena in the universe.
Einstein Probe.
This is according to a report by the ChinaDaily published on Saturday and quoting Yuan Weimin, principal investigator of the satellite project.