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Category: cosmology – Page 34

The Big Bang: A Cosmic Encore? Exploring the Possibility of Rebirth

In this fascinating exploration of cosmic mysteries, we delve into the question: Will the Big Bang happen again? Join us as we investigate the theories surrounding the universe’s origin, expansion, and potential future. We’ll cover concepts like the cyclic model, eternal inflation, and how quantum physics plays a role in the fate of the universe. Get ready for mind-bending theories and thought-provoking answers that could change your understanding of space and time! If you enjoyed this cosmic journey, please like and share the video with fellow space enthusiasts.

#BigBang #CosmicMysteries #Universe #Astronomy #SpaceExploration #TheoreticalPhysics.

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Why are ‘fireworks’ coming from a black hole? This is what scientists say

A supermassive black hole in the center of the Milky Way galaxy is creating a light show that’s intriguing astronomers.

Flares of light have been observed in a disk orbiting the black hole Sagittarius A*, according to a team of astrophysicists studying the black hole who published their findings Tuesday in The Astrophysical Journal Letters. Known as an accretion disk, it’s hot, contains a steady flow of materials like gas or plasma, and flickers constantly. The disks emit light that can be detected using infrared and X-ray instruments, which helps astronomers better observe the black holes the disks orbit.

Astronomers Just Unveiled 3,628 Supernovae That Could Rewrite Cosmic History

A massive dataset of 3,628 Type Ia Supernovae from the Zwicky Transient Facility is being released, offering new insights into cosmic expansion.

This unprecedented collection will refine how cosmologists measure distances and study dark energy. With high-precision data from cutting-edge telescopes, scientists aim to resolve discrepancies in the standard cosmological model and explore new physics.

A Game-Changing Dataset for Cosmology.

Astronomers Just Found a 3-Million-Light-Year Connection Between Galaxies

A new breakthrough in cosmic mapping has unveiled the structure of a colossal filament, part of the vast cosmic web that connects galaxies.

Dark matter and gas shape these filaments, but their faint glow makes them hard to detect. By using advanced telescope technology and hundreds of hours of observation, astronomers have captured the most detailed image yet, bringing us closer to decoding the evolution of galaxies and the hidden forces shaping the universe.

The hidden order of the universe.

This Gravitational-Wave Breakthrough Could Rewrite What We Know About the Universe

A new adaptive optics technology is set to transform gravitational-wave detection, allowing LIGO

LIGO, or the Laser Interferometer Gravitational-Wave Observatory, is a large-scale physics experiment and observatory to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. There are two LIGO observatories in the United States—one in Hanford, Washington, and the other in Livingston, Louisiana. These observatories use laser interferometry to measure the minute ripples in spacetime caused by passing gravitational waves from cosmic events, such as the collisions of black holes or neutron stars.

Germanium detectors help physicists unlock the mysteries of the universe

Ever since physicist Ernest Rutherford discovered the atomic nucleus in 1911, studying its structure and behavior has remained a challenging task. More than a century later, even with today’s high-tech tools for researching nuclear physics, mysteries of the universe abound.

Relying on leading-edge detectors developed by researchers at the Department of Energy’s Oak Ridge National Laboratory, the scientific community pursues elusive nuclear processes to unlock persistent mysteries. Answers to questions they hope to resolve hold the potential to redefine the universe itself. Why does the universe contain more matter than antimatter? Can a particle be both a matter and antimatter version of itself? Is there a mismatch between what the Big Bang produced and what the Standard Model of particle physics suggests?

Long at the vanguard of international efforts to answer questions like these, ORNL’s contributions remain strong today. David Radford, head of the lab’s Fundamental Nuclear and Particle Physics section, is an internationally renowned expert in the field who has had an indelible impact on the development of germanium detectors. Vital experimentation tools at the forefront of fundamental physics research, germanium detectors are large, single crystals of germanium—a metallic element—used to detect radiation and enable incredibly precise energy measurements.

The Unstoppable Party at the Heart of the Milky Way

For the study, the researchers used NASA’s powerful James Webb Space Telescope to observe Sagittarius A* to better understand its activity. After conducting several observations between 2023 and 2024, the researchers found that Sagittarius A* exhibited near-endless flare activity, ranging from faint flashes lasting a few seconds to massive eruptions occurring every day. Since Sagittarius A* interacts with the massive disk of gas and dust that comprises our galaxy, these results could help researchers better understand the formation and evolution of supermassive black holes throughout the universe.

“Flares are expected to happen in essentially all supermassive black holes, but our black hole is unique,” said Dr. Farhad Yusef-Zadeh, who is a professor at northwestern University and lead author of the study. “It is always bubbling with activity and never seems to reach a steady state. We observed the black hole multiple times throughout 2023 and 2024, and we noticed changes in every observation. We saw something different each time, which is really remarkable. Nothing ever stayed the same.”

Collision Alert! A Supermassive Black Hole is Headed for the Milky Way

2.4 billion years from now there will be a black hole colliding with the Milky Way.

A supermassive black hole hidden in the Large Magellanic Cloud is on a collision course with the Milky Way! Scientists discovered it using hypervelocity stars, and in 2.4 billion years, it will merge with Sagittarius A at our galaxy’s center. This event could reshape our galaxy and trigger gravitational waves! 🌌 Want to know what happens next? Watch the full video to explore the science behind this cosmic collision. Don’t miss it—subscribe now for more space discoveries! 🚀

Paper link: https://arxiv.org/abs/2502.

Chapters:
00:00 Introduction.
00:30 The Discovery and Characteristics of the Supermassive Black Hole.
03:11 The LMC-Milky Way Collision and Its Consequences.
05:34 Other Famous Supermassive Black Holes and What They Teach Us.
07:23 Outro.
07:35 Enjoy.

MUSIC TITLE : Starlight Harmonies.

Continue reading “Collision Alert! A Supermassive Black Hole is Headed for the Milky Way” | >

New X-ray experiment could solve major physics puzzles

Researchers have announced results from a new search at the European X-ray Free Electron Laser (European XFEL) Facility at Hamburg for a hypothetical particle that may make up the dark matter of the universe. The experiment is described in a study published in Physical Review Letters.

This experiment looks for axions, a particle which was proposed to solve a major problem in : why neutrons, although composed of smaller charged particles called quarks, do not possess an . To explain this, it was suggested that axions, tiny and incredibly light particles, can “cancel out” this imbalance. If observed, this process would provide direct evidence for new physics beyond the Standard Model.

Additionally, axions turn out to be a natural candidate for dark matter, the mysterious substance that constitutes most of the structure of the universe.