Results 71 to 80 of about 1,490 (202)
, 2020 Context. One of the most energetic bolide events in recent decades was detected by the US Government sensors (USGS) over remote areas of the Bering Sea on December 18, 2018, 23:48 UT. No ground-based optical observations exist. Aims.
J. Borovička +3 more
core +1 more source
Critique of arXiv submission 2308.15623, "Discovery of Spherules of Likely Extrasolar Composition in the Pacific Ocean Site of the CNEOS 2014-01-08 (IM1) Bolide", by A. Loeb et al [PDF]
, 2023 Recently a manuscript by Loeb et al. was uploaded to arXiv (preprint 2308.15623) that asserted that the CNEOS bolide 2014-01-08 was interstellar; that spherules recovered from the seafloor near the airburst were associated with this bolide; that they had
Desch, Steve, Jackson, Alan
core
Tra lingua dell’astronomia e lingua comune
Cuadernos de Filología Italiana, 2015 Il presente articolo analizza fenomeni di passaggio dal settoriale al comune e viceversa nell’ambito dell’astronomia. Lo studio permette di rintracciare suggestive forme di dialogo e non cesure tra passato e presente, tra tecnico e comune, un dialogo ...
Paola Capponi
doaj +1 more source
No Place to Hide? Regional Resilience and Vulnerability to Global Catastrophic Risk
Global Challenges, Volume 10, Issue 8, August 2026.No location on Earth withstands every global catastrophe. This review maps the geographic, institutional and infrastructural factors shaping resilience to nuclear, volcanic and impact winters, infrastructure loss and pandemics. Geographic isolation, food self‐sufficiency, strong governance and decentralization improve resilience across scenarios ...
Florian Ulrich Jehn +7 more
wiley +1 more source
The Astronomical JournalTwo bolides (2016 June 2 and 2019 April 4) were detected at multiple regional infrasound stations, with many of the locations receiving multiple detections.
Trevor C. Wilson +4 more
doaj +1 more source
Comparing Monte Carlo Models of Impact Alteration of Planetary Atmospheres
Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.Abstract One process that affects atmospheric surface pressure is impact bombardment. The evolution of a planet's atmosphere under impact bombardment is an open question. We use a Monte Carlo method to evolve a range (0.006–92.5 bar) of initial atmospheres at Mars, Earth, and Venus under bombardment of 5×106 $5\times 1{0}^{6}$ impactors using seven ...
M. R. Huffman +4 more
wiley +1 more source
The Astronomical JournalOn 2023 May 20, a ∼3.7 m diameter asteroid entered Earth’s atmosphere over northwest Queensland, Australia, at 27.9 km s ^−1 and underwent catastrophic fragmentation at ∼29 km altitude, producing 1 of the 20 most energetic bolide events reported by NASA ...
Elizabeth A. Silber +21 more
doaj +1 more source
The Paleomineralogy of the Hadean Eon Revisited
Life, 2018 A preliminary list of plausible near-surface minerals present during Earth’s Hadean Eon (>4.0 Ga) should be expanded to include: (1) phases that might have formed by precipitation of organic crystals prior to the rise of predation by cellular ...
Shaunna M. Morrison +2 more
doaj +1 more source
Impact-Ionization Mass Spectrometry of Cosmic Dust [PDF]
, 2003 In situ characterization of cosmic dust grains typically involves impact-ionization time-of-flight mass spectrometry. Considering the performance and limitations of previous instruments, I designed and tested a novel, compact time-of-flight mass ...
Austin, Daniel Ephraim
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Seeding the Solar System with Life: Mars, Venus, Earth, Moon, Protoplanets
Open Astronomy, 2020 In the space of the entire universe, the only conclusive evidence of life, is found on Earth. Although the ultimate source of all life is unknown, many investigators believe Earth, Mars, and Venus may have been seeded with life when these planets, and ...
Joseph Rhawn G. +3 more
doaj +1 more source