Category Astronomy/Space

Growing evidence for evolving dark energy could inspire a new model of the universe

Big bang expansion
The Big Bang started around 13.8 billion years ago. Diagram: NASA

The birth, growth and future of our universe are eternally fascinating. In the last decades, telescopes have been able to observe the skies with unprecedented precision and sensitivity.

Our research team on the South Pole Telescope is studying how the universe evolved and has changed over time. We have just released two years’ worth of mapping of the infant universe over 1/25th of the sky.

These observations have sharpened our understanding of the nature of dark energy and the rate at which the universe is expanding.

What is the current theory of how our universe began?
Our current model for the early universe is known as the “hot Big Bang.”

It describes the first stage of our universe as a primordial fireball...

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A mysterious mineral in asteroid Ryugu may rewrite planetary history

FE-TEM of Ryugu grain No. 15 from sample plate C0105-042, containing the djerfisherite inclusion
Scanning electron micrograph of the number 15 grain of sample plate C0105-042 from Ryugu, in which djerfisherite was discovered. (Hiroshima University/Masaaki Miyahara).

Serendipitous discovery of djerfisherite in Ryugu grain challenges current paradigm of the nature of primitive asteroids. A surprising discovery from a tiny grain of asteroid Ryugu has rocked scientists’ understanding of how our Solar System evolved. Researchers found djerfisherite—a mineral typically born in scorching, chemically reduced conditions and never before seen in Ryugu-like meteorites—inside a sample returned by Japan’s Hayabusa2 mission...

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Discovery of ‘mini halo’ points to how the early universe was formed

A distant galaxy cluster with a newly discovered radio mini-halo
This stunning image reveals a distant galaxy cluster teeming with energy: galaxies shine in visible light (white), ghostly red clouds unveil a newly discovered radio mini-halo—the most distant ever detected—and blue wisps trace the hot gas glowing in X-rays.
Credit: Chandra X-ray Center (X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; Radio: ASTRON/LOFAR; Image Processing: NASA/CXC/SAO/N. Wolk)

Astronomers have uncovered a vast cloud of energetic particles—a “mini halo”—surrounding one of the most distant galaxy clusters ever observed, marking a major step forward in understanding the hidden forces that shape the cosmos.

The mini-halo is at a distance so great that it takes light 10 billion years to reach Earth, making it the most distant ever found, doubling the previous dista...

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Super-resolution imaging reveals the first step of planet formation after star birth

Super-resolution imaging reveals the first step of planet formation after star birth
New high-resolution images of protoplanetary disks in the Ophiuchus star-forming region, created with improved analysis. The resolution is shown by the white ellipse in the lower left of each panel, with a smaller ellipse indicating higher resolution. The white line in the lower right of each panel indicates a scale of 30 au. The evolution stage of the central stars progresses from left to right, and from top to bottom in the same row. Credit: ALMA(ESO/NAOJ/NRAO), A. Shoshi et al.

Identifying the formation period of planetary systems, such as our solar system, could be the beginning of the journey to discover the origin of life. The key to this is the unique substructures found in protoplanetary disks—the sites of planet formation.

A protoplanetary disk is composed of low-temperat...

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