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Planetary Sciences Apr 8, 2024

Scientists solve a long-standing mystery surrounding the moon's 'lopsided' geology

About 4.5 billion years ago, a small planet smashed into the young Earth, flinging molten rock into space. Slowly, the debris coalesced, cooled and solidified, forming our moon. This scenario of how the Earth's moon came ...

Astronomy Apr 4, 2024

Researchers use the Dark Energy Spectroscopic Instrument to make the largest 3D map of our universe

With 5,000 tiny robots in a mountaintop telescope, researchers can look 11 billion years into the past. The light from far-flung objects in space is just now reaching the Dark Energy Spectroscopic Instrument (DESI), enabling ...

Astronomy Apr 13, 2024

Physicists solve puzzle about ancient galaxy found by Webb telescope

Last September, the James Webb Space Telescope, or JWST, discovered JWST-ER1g, a massive ancient galaxy that formed when the universe was just a quarter of its current age. Surprisingly, an Einstein ring is associated with ...

Astronomy Apr 7, 2024

The universe's accelerated expansion might be slowing down

The universe is still expanding at an accelerating rate, but it may have slowed down recently compared to a few billion years ago, early results from the most precise measurement of its evolution yet suggested Thursday.

Astronomy Apr 6, 2024

DESI first-year data delivers unprecedented measurements of expanding universe

Scientists have analyzed the first batch of data from the Dark Energy Spectroscopic Instrument's quest to map the universe and unravel the mysteries of dark energy.

General Physics Apr 15, 2024

Study uses thermodynamics to describe expansion of the universe

The idea that the universe is expanding dates from almost a century ago. It was first put forward by Belgian cosmologist Georges Lemaître (1894–1966) in 1927 and confirmed observationally by American astronomer Edwin Hubble ...

Astronomy Mar 28, 2024

Faintest known star system orbiting the Milky Way discovered

A team of astronomers led by the University of Victoria and Yale University has detected an ancient star system traveling around our galaxy named Ursa Major III / UNIONS 1 (UMa3/U1)—the faintest and lowest-mass Milky Way ...

Astronomy Apr 5, 2024

Researchers say neutron stars are key to understanding elusive dark matter

Scientists may be one step closer to unlocking one of the great mysteries of the universe after calculating that neutron stars might hold a key to helping us understand elusive dark matter.

Astronomy Apr 5, 2024

NASA's NEOWISE extends legacy with decade of near-Earth object data

As the infrared space telescope continues its long-duration survey of the universe, it is creating a unique resource for future astronomers to make new discoveries.

Astronomy Mar 21, 2024

Unveiling the formation of the first galaxies

Utilizing high-resolution three-dimensional radiation hydrodynamics simulations and a detailed supernova physics model run on supercomputers, a research team led by Dr. Ke-Jung Chen from the Institute of Astronomy and Astrophysics, ...

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