Astronomers are in a state of bewilderment after they discovered strange blasts of radiation from space. Those blasts, known as gamma-ray bursts (GRBs), seem to come from a black hole that is developing slowly after two stars merged. According to NewScientist, gamma-ray bursts come in two categories: short GRBs and gamma-ray explosions: short GRBs and long GRBs.
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Dark matter makes up about 27% of the matter and energy budget in the universe, but scientists do not know much about it. They do know that it is cold, meaning that the particles that make up dark matter are slow-moving. It is also difficult to detect dark matter directly because it does not interact with light. However, scientists at the U.S. Department of Energy’s Fermi National Accelerator Laboratory (Fermilab) have discovered a way to use quantum computers to look for dark matter.
Aaron Chou, a senior scientist at Fermilab, works on detecting dark matter through quantum science. As part of DOE’s Office of High Energy Physics QuantISED program, he has developed a way to use qubits, the main component of quantum computing.
Performing computation using quantum-mechanical phenomena such as superposition and entanglement.
The effects of solar activity are predicted to reach the Earth’s atmosphere by December 8.
The earth is all set to experience another set of solar flares, which is estimated to reach our atmosphere by December 8. After a relatively calmer period of solar activity, we are about to experience a high-velocity gush of solar winds and minor geomagnetic storms. The intensity of the storm expected is classified as G1, the least intense solar storm.
Images taken of the sun on December 4 by Eduardo Schaberger Poupeau, an astrophotographer, revealed five significant sunspots and two filaments of magnetism facing Earth.
NASA/SDO
According to NASA, a solar flare is described as an “intense burst of radiation coming from the release of magnetic energy associated with sunspots.” It is considered to be the largest explosive event in our solar system. “They are seen as bright areas in the sun and they can last from minutes to hours.”
Ultralight dark matter has wavelike properties that could affect the operation of the clocks.
For decades, scientists have been trying to wrap their heads around the dark matter, which makes up an estimated 85 percent of the mass in the universe. Despite experimental efforts running for decades, researchers have only been able to observe the essence, not quite detect it.
Now, a new study published in Nature Astronomy on December 5 revealed that an atomic clock on-board a spacecraft inside the inner depths of the solar system could search for ultralight dark matter. The latter has wavelike properties that could affect the operation of the clocks.
It’s not only the gravity from galaxies in a cluster that reveal dark matter, but the ejected, intracluster stars actually trace it out.
The James Webb Space Telescope has finally made its first dark matter observations, and the results could lead us to new physics. They have questioned our understanding of dark matter and the large-scale structure-formation of the Universe. Dark matter is one of the most mysterious entities in the cosmos. Our best cosmological models show that 27% of the observable Universe is made of dark matter. We can’t see it, but its existence can be inferred because of its effect on surrounding baryonic matter. The true nature of dark matter is still one of the biggest mysteries in cosmology. The most successful cosmological model to date, the lambda cold dark matter or the LCDM model, makes a critical prediction regarding dark matter. It says that cold dark matter played an important role to form the large-scale structures we observe today.
So far, we did not have the technology to test this prediction. But the James Webb Space Telescope opened the windows to the first billion years and the last unexplored era in the history of the Universe. The super-early galaxies discovered by Webb in its Early Release Science program provided an opportunity to test the predictions made by the LCDM model. And when astronomers did that, the results were completely unexpected. So what do these primordial galaxies discovered by Webb tell us? What did Webb find in its first dark matter observations? Finally, and most importantly, how can these results change the course of cosmology?
The 36th episode of the Sunday Discovery Series answers all these questions in detail.
All Episodes Of The Series: https://bit.ly/369kG4p.
Basics of Astrophysics series: https://bit.ly/3xII54M
REFERENCES:
JWST high-z galaxies constraints on warm and cold dark matter models, Maio and Viel — https://bit.ly/3B8kcZ0
Earlier this year, scientists discovered that a “jet,” created by a very distant supermassive black hole, sent an accumulation of various space matter rocketing directly toward Earth. Scientists haven’t expressed any need for concern about the jet. However, they are intrigued by the sheer brightness of it and the vast distance between it and Earth.
Universe to go through a cosmic Poincare Recurrence? In other words, can the universe repeats itself? Will the same history happen again at some distant future? If the universe is closed and isolated, which indicates that it’s probably qualified for experiencing a Poincare Recurrence in cosmic scale, will the entire history of our universe happen for an infinite number of times? If cosmic Poincare Recurrence can take place, does it mean that the entropy of the entire universe will decrease at some point? Isn’t that the violation of the second law of thermodynamics?
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Sources:
(K. Ropotenko) The Poincar´e recurrence time for the de Sitter space with dynamical chaos.
https://arxiv.org/abs/0712.
(Don N. Page) Information Loss in Black Holes and-or Conscious Beings.
https://arxiv.org/abs/hep-th/9411193
(Julian Barbour) Arrows of Time in Unconfined Systems.
https://arxiv.org/abs/1602.
(Lisa Dyson, Matthew Kleban, Leonard Susskind) Disturbing Implications of a Cosmological Constant.
https://arxiv.org/abs/hep-th/0208013
Leonard Susskind (Stanford University, USA), James Lindesay (Howard University, USA)