• SpaceX Junk Hits the Moon. Not a Good Sign

    SpaceX Junk Hits the Moon. Not a Good Sign
    The spent upper stage from a SpaceX Falcon 9 rocket has struck the Moon, illustrating the hazard posed by debris in cislunar space. This problem will increase as launches to orbit and to the Moon become more common in the coming years.
  • Astronomers Find a New Object from the Early Universe Using Webb Data

    Astronomers Find a New Object from the Early Universe Using Webb Data
    Homer Dávila Gutierrez, director of SKYCR.ORG, has identified a gravitational arc candidate in the galaxy cluster MACS J0308.9+2645 from public data from the James Webb Space Telescope. The object had not been previously reported and is located at a photometric redshift close to 4.4. The preprint is available on arXiv and the manuscript is under review in Publications of the Astronomical Society of Japan.
  • Preview to Totality: A Resource Guide to August 12th Total Solar Eclipse

    Preview to Totality: A Resource Guide to August 12th Total Solar Eclipse
    It’s almost show time. We’re just a few days away now, from the only total solar eclipse of 2026. While eclipses are a surety as the celestial gears of the Universe grind on, there are always a few unknowns leading up to eclipse day. We wrote a recent guide to the upcoming total solar eclipse featuring totality across Greenland, Iceland, the North Atlantic and Spain on August 12th. As that date is now only a few days away, it’s a good time to look at prospects and resources to
  • Na twintig jaar waarnemingen aan blazars blijven de mysteries zich opstapelen

    Smalle stralen lichtgevende materie kunnen vanuit de kernen van actieve sterrenstelsels op miljarden lichtjaren afstand richting de aarde worden uitgestoten. Het sterrenstelsel verschijnt dan als een puntbron en wordt een blazar genoemd. Een Pools-Duits team van wetenschappers heeft voor het eerst de activiteit van zo’n blazar gedurende een langere periode geanalyseerd en stuitte, in plaats […]
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  • De Adelaarsnevel revisited

    Ik heb de Adelaarsnevel (Messier 16) in het sterrenbeeld Slang vorig jaar ook al eens gefotografeerd, toen met de Askar Fra400 telescoop. Afgelopen twee nachten heb ik ‘m weer gefotografeerd, bij elkaar 3,5 uur (70x180s) – net zo lang als vorig jaar. Dit keer heb ik ‘m hier in Dordrecht (het ⭐Sagittarius Observatorium⭐) gefotografeerd met de […]
  • Scientists Watch as a Distant World's Atmosphere Shrinks and Thins

    Scientists Watch as a Distant World's Atmosphere Shrinks and Thins
    As dwarf planet Pluto moves along in its distant, high-obliquity 248-year orbit, its atmosphere is changing. That's because it's beginning to travel through colder, darker parts of the outer Solar System for the next 88 years. As a consequence, the mostly-nitrogen atmosphere is expected to grow gradually thinner and eventually freeze out over the coming decades. When that happens, the atmosphere will shrink.

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