Tag

Universe

All articles tagged with #universe

science5 days ago•5 min saved

Cosmic Fate Rewritten: Could the Universe End in a Big Crunch

A Cornell-led analysis proposes the expansion of the universe could be temporary and eventually reverse if the cosmological constant is negative, driven by an ultralight axion field. The model places the universe’s total lifespan at about 33.3 billion years, with a slow crunch starting in roughly 11 billion years and final collapse about 8 billion years later (around 19–20 billion years from now). If dark energy’s behavior continues to deviate from a true constant, this Big Crunch scenario could hold; upcoming surveys and missions (Euclid, Rubin Observatory, SPHEREx) are expected to refine measurements and test the idea.

via Indian Defence Review|

#big-crunch #cosmology #dark-energy

space8 days ago•58 min saved

Thirty Cosmos Facts That Will Blow Your Mind

BuzzFeed’s list of 30 mind-blowing space facts spans the cosmos—from the observable universe’s staggering scale (about one septillion stars) and a universe dominated by dark energy and dark matter to eye-opening specifics like Venus’s day lasting longer than its year, Saturn’s ultra-low density (it would float in water), Olympus Mons dwarfing Earth’s tallest mountain, and the Moon’s regolith preserving footprints for up to 100 million years. It also covers neutron stars’ immense density, interstellar visitors like Oumuamua and Borisov, a giant reservoir of water 12 billion light-years away, blue sunsets on Mars, and even the Sun’s hypothetical roar in space.

via BuzzFeed|

#astronomy #cosmology #physics

space-and-astronomy22 days ago•8 min saved

Webb maps the Universe's invisible scaffolding in unprecedented detail

Astronomers using NASA's James Webb Space Telescope produced the most detailed map yet of dark matter, revealing how its gravity pulled ordinary matter into dense regions that formed galaxies and, eventually, planets. The map deepens understanding of the invisible structure shaping the cosmos and will guide future surveys (e.g., Euclid, Roman) to refine dark-matter properties and evolution.

via ScienceDaily|

#cosmology #dark-matter #galaxy-formation

science1 month ago•5 min saved

Cosmic Hall of Mirrors: Could the Universe Loop Back on Itself?

A COMPACT collaboration suggests the universe could be finite yet boundary-less, with light looping through space in a 3-torus topology that could create mirrored observations of the same region. While not yet confirmed, the idea expands searches for topological fingerprints in the CMB and broader Euclidean/non-Euclidean models.

via Indian Defence Review|

#3-torus #cmb #cosmology

science1 month ago•6 min saved

Dark Matter Might Interact with Cosmic Ghost Particles, Scientists Say

New research suggests dark matter may interact with neutrinos, which could explain why the universe is less 'clumpy' than expected and challenge current cosmological models. Future observations, including cosmic microwave background studies and gravitational lensing, aim to test this hypothesis, potentially leading to a major breakthrough in understanding dark matter.

via Space|

#cosmology #dark-matter #galaxy-formation

science1 month ago•4 min saved

New Research Suggests the Universe Is More Complex and Lopsided Than Previously Thought

Recent research suggests the universe may be lopsided, challenging the standard cosmological model that assumes it is uniform in all directions, due to discrepancies like the cosmic dipole anomaly which do not align with current theories, prompting a potential overhaul of our understanding of the cosmos.

via Space|

#cmb #cosmic-dipole-anomaly #cosmology

science1 month ago•4 min saved

Astronomers Mystified by Unprecedented Seven-Hour Gamma-Ray Burst

A record-breaking gamma-ray burst lasting nearly seven hours was observed, challenging existing models of such cosmic explosions. The event, originating from a dusty galaxy billions of light-years away, involved a high-speed jet of material and may have resulted from various extreme astrophysical processes. This unprecedented observation offers a unique opportunity to study extreme physics in the universe.

via SciTechDaily|

#astronomy #cosmic-explosion #gamma-ray-burst

science1 month ago•3 min saved

Japanese Sensor Could Unlock Dark Matter Secrets

Physicists at the University of Tokyo and Chuo University have developed a highly sensitive quantum sensor array that could potentially detect and track dark matter by measuring its movement through space, offering a more general and sensitive approach than traditional methods, though it remains at the theoretical stage.

via The Daily Galaxy|

#dark-matter #particle-detection #physics

science1 month ago•3 min saved

Is the Universe Headed for a 'Big Crunch' as Dark Energy Changes?

A new study suggests that dark energy may be weakening, potentially leading to a reversal of the universe's expansion and a catastrophic collapse into a Big Crunch, challenging long-held scientific beliefs and sparking debate among astrophysicists.

via The Daily Galaxy|

#astrophysics #big-crunch #cosmology

science2 months ago•5 min saved

Potential Changes in Dark Energy Could Alter the Universe's Future

Recent studies suggest that dark energy, which is driving the universe's expansion, may be weakening, potentially leading to a reversal of expansion and a possible 'Big Crunch' instead of the previously believed continuous acceleration. This challenges current cosmological models and has sparked significant debate among astronomers.

via BBC|

#big-crunch #cosmology #dark-energy

science2 months ago•3 min saved

NASA’s SPHEREx Unveils First Comprehensive Infrared Cosmic Map

NASA's SPHEREx observatory has completed its first full-sky infrared map in 102 wavelengths, capturing data on over 450 million galaxies and providing new insights into the universe's origins, galaxy evolution, and cosmic structure. The mission's extensive multi-wavelength data will help address fundamental cosmological questions and is now publicly available.

via Universe Today|

#cosmos #infrared-map #nasa

cosmology2 months ago•4 min saved

Physicists Revisit Bold Theory of Cosmic Black Hole Trap

Some physicists propose that our universe might exist inside a black hole of a larger cosmos, based on theories linking black hole information paradoxes, holography, and cosmic geometry, suggesting a universe within a universe concept that challenges traditional views of space and time.

via The Daily Galaxy|

#black-holes #cosmic-theory #cosmology

science2 months ago•3 min saved

Zombie Stars Could Illuminate Dark Matter Mysteries

Researchers from the University of British Columbia explored the potential link between axions, a dark matter candidate, and white dwarf stars, using data from the Hubble Space Telescope. Although their analysis did not find evidence of axion-induced cooling, it established new limits on axion-electron interactions, guiding future dark matter research. The study highlights the importance of exploring various astrophysical phenomena to understand elusive particles like axions.

via Gizmodo|

#astrophysics #axions #dark-matter

science2 months ago•9 min saved

Astronomer Reveals Distribution of Most Normal Matter in the Universe

Most of the universe's normal matter isn't in stars or galaxies but is distributed in the cosmic web between galaxies, with recent studies using fast radio bursts confirming that about 76% of normal matter resides in intergalactic space, supporting the Big Bang theory. Dark matter, which makes up most of the universe's mass, remains largely mysterious, but scientists are actively studying it through various methods including underground detectors and telescopes.

via Space|

#cosmic-web #dark-matter #fast-radio-bursts

science2 months ago•4 min saved

Physicists Explore the Possibility of Our Universe as a Black Hole

Some physicists speculate that our universe might be a hologram encoded on a 2D boundary or even exist inside a black hole of a larger universe, based on theories related to black hole thermodynamics and the holographic principle, though these ideas remain highly speculative and not widely accepted as definitive explanations.

via IFLScience|

#black-hole-information-paradox #black-holes #cosmology