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Pushing the boundaries of space exploration with X-ray polarimetry

The Imaging X-ray Polarimetry Explorer (IXPE) mission enables new measurements of cosmic X-ray sources, such as pulsars, black holes, and neutron stars. With its state-of-the-art telescopes and detectors, IXPE will provide high-quality polarization data of various sources, including supernova remnants, active galaxies, and blazars.

SourceSPIE--International Society for Optics and Photonics·JournalJournal of Astronomical Telescopes Instruments and Systems·DateApr 22, 2022

Extraordinary black hole found in neighboring galaxy

Astronomers have found an intermediate-mass black hole in the Andromeda galaxy, one of only a few confirmed objects of its kind. The discovery sheds light on the formation of galaxies and provides insights into the population of black holes at the centers of low-mass galaxies.

SourceUniversity of Utah·JournalThe Astrophysical Journal·TypeComputational simulation/modeling·DateJan 24, 2022

Palomar survey instrument analyzes impact of starlink satellites

Researchers studied archival images from the Palomar Observatory's Zwicky Transient Facility and found that Starlink satellite streaks now appear in almost 20% of twilight images. Software can help mitigate potential problems, but the impact on astronomy is still a concern, especially for future surveys like Vera C. Rubin Observatory.

SourceCalifornia Institute of Technology·JournalThe Astrophysical Journal Letters·DateJan 17, 2022

Challenging Einstein’s greatest theory with extreme stars

A team of international researchers challenged Einstein's theory of general relativity using pulsars as a cosmic laboratory. They detected new relativistic effects, including light deflection and time dilation, with unprecedented precision. The study provides significant insights into gravity theories and the fundamental forces of nature.

SourceUniversity of East Anglia·JournalPhysical Review X·TypeObservational study·DateDec 13, 2021

Infant stars identified at the center of our galaxy

Three young stars have been discovered at the center of our galaxy, contradicting initial assumptions about a gas and dust cloud called G2. The unusual temperature of G2 has sparked debate among astronomers, but new observations reveal it is actually composed of three evolving young stars.

SourceUniversity of Cologne·JournalThe Astrophysical Journal·TypeObservational study·DateDec 10, 2021

Cloud-spotting on a distant exoplanet

Clouds have been detected on the distant exoplanet WASP-127b, and their altitude has been measured for the first time. The observations reveal that water vapor is present at lower levels but screened by clouds opaque to visible light, while sodium is found in an unexpected place.

A white dwarf living on the edge

Astronomers have identified a white dwarf so massive that it may collapse. The discovery provides an example of what can happen after the phase where two less massive white dwarfs merge into one. This process boosts the magnetic field and speeds up rotation compared to progenitors.

SourceW. M. Keck Observatory·JournalNature·DateJun 30, 2021

Hot stars are plagued by giant magnetic spots, ESO data shows

Extreme horizontal branch stars, with four to five times hotter than the Sun, show giant magnetic spots that cause regular brightness variations. These spots are also linked to superflare events, explosions of energy several million times more energetic than similar eruptions on the Sun.

SourceESO·JournalNature Astronomy·DateJun 1, 2020

Astronomers capture first image of a black hole

Scientists have captured the first-ever image of a black hole, which reveals the massive black hole at the center of the galaxy Messier 87. The image was achieved using the Event Horizon Telescope (EHT), an unprecedented Earth-sized virtual telescope linking telescopes around the globe.

SourceESO·JournalThe Astrophysical Journal Letters·DateApr 10, 2019