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1,000+ results for "Star Cluster"

Eccentric exoplanet discovered

A sub-Neptune exoplanet named TOI-2257 b has been found to have an eccentric orbit around its host star, making it a candidate for further study. The planet's distance from the star allows for liquid water and potentially life-supporting conditions.

SourceUniversity of Bern·JournalAstronomy and Astrophysics·DateJan 7, 2022

Discovery of the least 'metallic' stellar structure in the Milky Way

A unique stellar structure in the Milky Way, C-19, has been found to consist of stars with extremely low metallicity, challenging current understanding of star formation models. This discovery provides a direct window into the earliest ages of star formation and the development of stellar structures in the distant past.

SourceCNRS·JournalNature·DateJan 5, 2022

High-speed propeller star is fastest spinning white dwarf

Astronomers have detected a white dwarf star that spins at an incredible rate of once every 25 seconds, completing one rotation faster than Earth. The star is thought to be the size of the Earth but massive enough to pull material from its companion star, creating a magnetic propeller system.

SourceUniversity of Warwick·JournalMonthly Notices of the Royal Astronomical Society Letters·DateNov 22, 2021

An explosive Cosmic Chinese Conundrum - a hot detective story from a very cold case: HKU astrophysicists solve a 900-year-old mystery, giving an ancient Chinese guest star of AD 1181 a place to stay and rest

HKU astrophysicists identify historical supernova of AD 1181 with recent discovery of 'Parker's star' and its surrounding nebula Pa30. The team found the event matches ancient Chinese reports within 3.5 degrees, providing a firm historical basis for the rare Type Iax designation.

SourceThe University of Hong Kong·JournalThe Astrophysical Journal Letters·DateSep 15, 2021

How special are we?

A recent study sheds light on the formation of planetary systems like our own, suggesting that nearby supernovas may have contaminated gas with radioactive material. The researchers found a 59% chance that the enrichment process in Ophiuchus star-forming region is due to supernovas.

SourceUniversity of Vienna·JournalNature Astronomy·DateAug 17, 2021

Teardrop star reveals hidden supernova doom

Astronomers have discovered a rare teardrop-shaped star system that will eventually become a Type Ia supernova. The system, HD265435, is comprised of a hot subdwarf and a white dwarf star orbiting each other closely, with the white dwarf being as heavy as our Sun but slightly smaller than Earth's radius.

SourceW. M. Keck Observatory·JournalNature Astronomy·DateJul 12, 2021

Satellite galaxies can carry on forming stars when they pass close to their parent galaxies

Using numerical simulations, researchers showed that satellite galaxies can retain gas and experience new episodes of star formation after passing close to their parent galaxy. This process is driven by the satellite's reserve of cold gas and minimum distance from its parent galaxy.

SourceInstituto de Astrofísica de Canarias (IAC)·JournalMonthly Notices of the Royal Astronomical Society·DateJul 6, 2021

Mysterious hydrogen-free supernova sheds light on stars' violent death throes

Astronomers have discovered a mysterious yellow star that exploded without the typical hydrogen layer, revealing new insights into the violent death throes of massive stars. The discovery challenges current understanding of stellar evolution and suggests that these stars may undergo catastrophic eruptions before exploding.

SourceRoyal Astronomical Society·JournalMonthly Notices of the Royal Astronomical Society·DateMay 5, 2021

Strong and flexible cofactors

Scientists have created a cube-shaped iron-sulfur cluster that can support a multiple bond between iron and nitrogen, a structural motif involved in biological nitrogen fixation. The discovery shows the cluster's ability to accommodate an unusual bond without distorting its structure.

SourceWiley·JournalAngewandte Chemie International Edition·DateMay 3, 2021

Measuring neutron star squeezability

Researchers used NASA's NICER telescope on the International Space Station to measure the size of PSR J0740+6620, the most massive known neutron star. The team's findings provide insights into the squeezability of matter in neutron star cores, shedding light on what happens when neutrons break down into smaller particles.

The GRANTECAN discovers the largest cluster of galaxies known in the early universe

A new study led by IAC researchers using the OSIRIS instrument on GRANTECAN has discovered the most densely populated galaxy cluster in formation in the primitive universe. The cluster, located 12.5 billion light years from us, is made up of galaxies with normal star formation rates and is predicted to evolve into a Virgo-like cluster.

SourceInstituto de Astrofísica de Canarias (IAC)·JournalMonthly Notices of the Royal Astronomical Society·DateFeb 26, 2021

Star employees get most of the credit - and blame

Research by Cornell University's ILR School found that collaborating with a star employee reduces non-star employees' credit and gains in professional status during successful collaborations. However, it can mitigate or outweigh the loss of professional status associated with collaborative failure.

SourceCornell University·JournalPersonnel Psychology·DateFeb 16, 2021

Galaxy mergers could limit star formation

A new study by Durham University and colleagues suggests that galaxy mergers could shut down star formation in the early universe, affecting galaxy growth. The researchers observed a massive galaxy, ID2299, which ejected half of its gas into the intergalactic medium due to the merger.

SourceDurham University·JournalNature Astronomy·DateJan 11, 2021

Bio-inspired lanthanide-transition metal cluster for efficient overall water splitting

Researchers from Xiamen University demonstrated a bio-inspired heterometallic cluster that mimics the CaMn4O5 structure of PSII, showing efficient overall water splitting activity without sacrificial reagents. The cluster anchors on phosphorus-doped graphitic carbon nitrides and exhibits high H2 production rates and O2 evolution rates.

SourceScience China Press·JournalNational Science Review·DateDec 10, 2020

Blast from the past

A team of astronomers using Gemini North's GNIRS instrument discovered that CK Vulpeculae, a bright new star in 1670, is approximately five times farther away and has ejected gas at much higher speeds than previously reported. The new findings suggest the explosion was far more violent, releasing roughly 25 times more energy than a nova.

SourceAssociation of Universities for Research in Astronomy (AURA)·JournalThe Astrophysical Journal Letters·DateNov 24, 2020