Results 31 to 40 of about 7,767,873 (255)
On the dynamics of short-period comets [PDF]
, 1987 Численно изучена эволюция орбит наблюдавшихся короткопериодических комет на промежутках времени до 50 000 лет. Рассмотрены особенности их либрационного и стохастического движения.
Емельяненко, В.В.
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The Astrophysical Journal Supplement SeriesWe present the first results from the Cometary Object Study Investigating their Nature and Evolution (COSINE) project, based on a uniformly processed data set of 484 comets observed over the full 15 yr duration of the Wide-field Infrared Survey Explorer (
Yuna G. Kwon +10 more
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Pits on Jupiter-family Comets and the Age of Cometary Surfaces
The Planetary Science Journal, 2023 Large and deep depressions, also known as pits, are observed at the surface of all Jupiter-family comets (JFCs) imaged by spacecraft missions. They offer the opportunity to glimpse the subsurface characteristics of comet nuclei and study the complex ...
Aurélie Guilbert-Lepoutre +6 more
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Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization
Advanced Materials Interfaces, EarlyView.Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan +6 more
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The activity characteristics and mechanisms of long-period comets
Earth and Planetary PhysicsComets are small celestial bodies orbiting around the Sun. They are remnants left over from the formation of the solar system; their interiors store original material of the planetary disk within the solar system. They are thus "fossils" for studying the
YingQi Wu +3 more
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The long-term dynamical behavior of short-period comets [PDF]
, 1993 The orbits of the known short-period comets under the influence of the Sun and all the planets except Mercury and Pluto are numerically integrated. The calculation was undertaken in order to determine the dynamical lifetimes for these objects as well as ...
Levison, Harold F., Duncan, Martin J.
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Advanced Science, EarlyView.Integrative multi‐omics analysis delineates a mitochondrial–immune axis governing neoadjuvant chemotherapy response in high‐grade serous ovarian cancer. Immune‐active tumors exhibit enhanced B‐cell infiltration and favorable sensitivity, whereas metabolically rewired tumors display oxidative phosphorylation dependency and resistance.
Wei Jiang +11 more
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The Astronomical Journal, 2023 High-resolution near-infrared ground-based spectroscopic observations of comet 67P/Churyumov–Gerasimenko near its maximum activity in 2021 were conducted from the W. M. Keck Observatory, using the facility spectrograph NIRSPEC.
Boncho P. Bonev +22 more
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REGγ Suppresses Ferroptosis and Induces Drug Resistance by Degrading WDR6 in Chondrosarcoma
Advanced Science, EarlyView.Here, we identified REGγ as a susceptibility factor in chondrosarcoma. Our study demonstrates that abnormally activated REGγ‐20S proteasome promotes chondrosarcoma development and progression. Further validation in animal models revealed that blocking REGγ function induced ferroptosis, suppressed malignant progression of chondrosarcoma, and uncovered a
Fanrong Liu +20 more
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Long Dust Trails of Short Period Comets [PDF]
International Astronomical Union Colloquium, 1991 Comets constitute an important source for the zodiacal dust cloud. Mainly large particles are contributed because the smaller particles are emitted into hyperbolic orbits relative to the sun. Radiation pressure force reduces the effective solar gravitational attraction. Information about large cometary particles can be derived from a variety of sources
H. U. Keller, K. Richter
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