Dark Energy
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Inflation and Dark Energy from a Covariant Elastic Medium
arXiv:1805.03020v4 Announce Type: replace Abstract: In this article, we propose a unified framework for cosmological expansion and inflation at the level of background dynamics, by modeling both the inflaton field and dark energy as a four-dimensional continuous medium, whose elastic deformation is described by a covariant vector field. Focusing on a homogeneous and isotropic background cosmology, we show that for a bulk modulus $K = 1.64 \times 10^{109}~\text{N}\cdot\text{m}^{-2}$, the dark...
Cardi B claims Donald Trump’s attendance brought a 'dark' energy to NBA Finals Game 3
Some people find a way to blame President Donald Trump for just about everything. Apparently, that now includes the New York Knicks losing an NBA Finals game. Following New York's 115-111 loss to the San Antonio Spurs in Game 3 on Monday night, rapper Cardi B suggested Trump's presence at Madison Square Garden may have brought some bad juju into the building.
OECD warns of ‘dark scenario’ if Gulf energy crisis drags on
Growth rates would tumble to levels rarely seen outside of major global events such as the Covid-19 pandemic
Roman telescope's massive infrared mirror is ready to fly
Roman telescope's massive infrared mirror is ready to fly Sadie Harley Scientific Editor Andrew Zinin Lead Editor NASA has completed its final inspection of the primary mirror on the Roman Space Telescope, which measures 2.4 meters (7.9 feet) in diameter and contains a layer of silver hundreds of times thinner than a human hair, at 400 nanometers. The primary mirror will help accomplish Roman's mission objectives using near-infrared light, including studying dark matter and dark energy,...
Late-Time Cosmology and Structure Formation in Quadratic $f(Q)$ Gravity
arXiv:2606.02660v1 Announce Type: new Abstract: We investigate the cosmological evolution associated with the quadratic symmetric teleparallel gravity framework, \( f(Q)=Q+\alpha Q^{2}+\beta \) where the relation \(Q\propto H^{2}\) generates an additional \(H^{4}\) contribution to the Friedmann equation. Using the exact algebraic solution for $H(z)$, we reconstruct the effective dark-energy sector and compare the background evolution with $\Lambda$CDM using Type Ia supernovae, BAO, and...
HETDEX opens massive Cosmic Noon dataset to scientists, novices and AI
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX)—which recently completed the largest survey ever taken of the early universe—has released all of its immense, information-rich database to the public. Built from more than half a petabyte of raw and processed data, it will allow astronomers to study how the first galaxies formed and evolved, measure how gas and stars were distributed within these galaxies, map the large-scale structure of the cosmos, and investigate rare and...
Rubin Tracks Skyscraper-Size Asteroids and Failed Supernovas
Rubin Tracks Skyscraper-Size Asteroids, Failed Supernovas, and Interstellar Visitors Introduction Over the years, anticipation has built for the start of observations at the Vera C. Rubin Observatory in the mountains of the Atacama Desert in Chile. Originally imagined in the mid-1990s as the Dark Matter Telescope, Rubin is designed to study our constantly moving and changing universe in greater detail than ever before. Once every few days for a decade, Rubin will take images of the entire...
Glittering star cluster image reveals missing patch of stars: 'We were not looking for the gap, but we found it'
Glittering star cluster image reveals missing patch of stars: 'We were not looking for the gap, but we found it' The new view captures an irregularity in how stars are distributed within NGC 6397. A gorgeous new portrait of an ancient star cluster reveals an unexpected imperfection: a visible gap in the brightness of its stars. The stunning image, taken by the European Space Agency’s (ESA) Euclid space telescope, captures NGC 6397 — one of the closest globular clusters to Earth.
How the electromagnetic spectrum opened our eyes to the universe
The following is an extract from our Lost in Space-Time newsletter. Each month, we dive into fascinating ideas from around the universe. You can sign up for Lost in Space-Time here.
Super Typhoon Sinlaku triggered atmospheric gravity waves visible from space
Super Typhoon Sinlaku triggered atmospheric gravity waves visible from space A record-early super typhoon sent giant atmospheric ripples into near-space, offering scientists a new clue for tracking powerful storms. - Date: - June 3, 2026 - Source: - NASA Earth Observatory - Summary: - One of the most powerful typhoons ever recorded this early in the Pacific season did more than unleash flooding and extreme winds—it sent enormous ripples all the way into the upper atmosphere.