Category Astronomy/Space

The Swan Song of a Cloud Approaching the Milky Way’s Supermassive Black Hole

KECK OBSERVATORY NIRC2 AND ADAPTIVE OPTICS IMAGE TAKEN IN SUMMER 2021 SHOWING THE GAS AND DUST STRUCTURES IN THE GALACTIC CENTER, INCLUDING G OBJECTS AND X7.
Credit: A. Ciurlo et al./UCLA GCOI/W. M. Keck Observatory

Two decades of monitoring from W. M. Keck Observatory on Mauna Kea in Hawaiʻi reveals a peculiar cloud dubbed X7 being pulled apart as it accelerates toward the supermassive black hole at the center of our Milky Way galaxy.

Astronomers from the UCLA Galactic Center Orbits Initiative (GCOI) and Keck Observatory have been tracking the evolution of this dusty gas filament since 2002; high-angular resolution near-infrared images captured with Keck Observatory’s powerful adaptive optics system show X7 has become so elongated that it now has a length of 3,000 times the distanc...

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Unknown Class of Water-Rich Asteroids Identified

Unknown of water-rich asteroids identified
Implantation of planetesimals into the asteroid belt during the planets’ growth and dynamical evolution. Credit: Nature Astronomy (2023). DOI: 10.1038/s41550-023-01898-x

New astronomical measurements in the infrared range have led to the identification of a heretofore unknown class of asteroids. An international research team including geoscientists from Heidelberg University has succeeded in characterizing these small planets using infrared spectroscopy.

They are located in the asteroid belt between Mars and Jupiter and are—similar to the dwarf planet Ceres—rich in water. According to computer models, complex dynamic processes shifted these asteroids from the outer regions of our solar system into today’s asteroid belt shortly after their creation.

With an equatorial diame...

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Newly discovered form of Salty Ice could exist on Surface of Extraterrestrial Moons

Newly discovered form of salty ice could exist on surface of extraterrestrial moons
Researchers discovered two new crystals made from water and table salt at low temperatures, below about minus 50°C. The known structure (left) has one salt molecule (yellow and green balls) to two water molecules (red and pink balls). X-ray imaging let researchers determine the position of individual atoms in the new structures. The center structure has two sodium chloride molecules for every 17 water molecules and stays stable even if pressure drops to near vacuum, as would exist on a lunar surface. The structure on the right has one sodium chloride molecule for every 13 water molecules, and is stable only at high pressure. Credit: Baptiste Journaux/University of Washington

The red streaks crisscrossing the surface of Europa, one of Jupiter’s moons, are striking...

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Astrophysics: Scientists observe High-speed Star Formation

New observations have brought to light that stars can form through the dynamic interaction of gas within interstellar gas clouds. This process unfolds faster than previously assumed, research within the FEEDBACK programme on board the flying observatory SOFIA revealed.

Even though SOFIA is no longer in operation, the data collected so far are essential for basic astronomical research because there is no longer an instrument that extensively maps the sky in this wavelength range (typically 60 to 200 micrometres). The now active James Webb Space Telescope observes in the infrared at shorter wavelengths and focuses on spatially small areas...

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