Results 41 to 50 of about 586,778 (202)

Biases and Uncertainties in Radiosonde‐Based Precipitable Water Vapor

Earth and Space Science, Volume 13, Issue 9, September 2026.
Abstract Precipitable water vapor (PWV) plays an important role in weather and climate phenomena. Accurate PWV measurements based on radiosonde observations are essential for assessing remote‐sensing measurements and long‐term trends. This study examines the performance of PWV algorithms, including their intrinsic biases and their sensitivity to ...
António P. Ferreira, Cesar Azorin‐Molina, Luis Gimeno   +2 more
wiley   +1 more source

Molecular oxygen in oort cloud comet 1P/Halley [PDF]

, 2015
Recently, the ROSINA mass spectrometer suite on board the European Space Agency's Rosetta spacecraft discovered an abundant amount of molecular oxygen, O2, in the coma of Jupiter family comet 67P/Churyumov-Gerasimenko of O2/H2O = 3.80 ± 0.85%.
Schwehm, G., Dishoeck, E.F. van, Dishoeck, E. F. van, Rubin, Martin, Altwegg, K., Rubin, M., Altwegg, Kathrin   +6 more
core   +3 more sources

A Theory for the Global Wind Energy Dissipation Across Climates

AGU Advances, Volume 7, Issue 5, August 2026.
Abstract Atmospheric winds play a key role in shaping climate, ecosystems, and infrastructure. The energy that drives the winds is generated by the atmospheric heat engine. However, traditional entropy‐budget descriptions of this heat engine rely on poorly constrained microscale processes, limiting their predictive power.
Malte F. Jansen, Hsing‐Hung Chou, Seth Seidel   +2 more
wiley   +1 more source

On the Early Thermal Processing of Planetesimals during and after the Giant Planet Instability

The Planetary Science Journal
Born as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history.
Anastasios Gkotsinas, David Nesvorný, Aurélie Guilbert-Lepoutre, Sean N. Raymond, Nathan Kaib   +4 more
doaj   +1 more source

Galactic tides in the Solar System within a non-axisymmetric Milky Way model adjusted to Gaia data

Astronomy & Astrophysics
Context. Galactic tides are the external differential forces felt by extended systems immersed in the Galactic potential. They are known to play a determinant role in the dynamics of comets in the Oort cloud. Aims. We aim to establish the strength of the
Bougakov Alexandre, Rany Khalil Yassin, Fouchard Marc, Saillenfest Melaine, Famaey Benoit, Di Matteo Paola, Haywood Misha   +6 more
doaj   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1994-2015, August 2026.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

The activity characteristics and mechanisms of long-period comets

Earth and Planetary Physics
Comets 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, JianChun Shi, Man-To Hui, Xian Shi   +3 more
doaj   +1 more source

The Oort cloud and the motion of the Sun in the Galaxy

, 2011
Workshop program and abstracts available at: http://lal.univ-lille1.fr/oort_workshop_prog.htmlShould the Oort cloud care about how the Solar System moves around the Galaxy?
Mikkola, Seppo, Nurmi, Pasi, Gardner, Esko, Flynn, Chris   +3 more
core   +2 more sources

Effects of Comet Encke's Meteoroid Stream on the Seasonal Variation of Mercury's Ca Exosphere

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Mercury's calcium (Ca) exosphere, observed by NASA's MESSENGER mission, exhibits high temperatures (>50000 K) and pronounced seasonal variability, with its source mainly on the dawn side. Enhanced Ca emission near True Anomaly Angle (TAA) ∼25° and ∼150° has been attributed to Comet 2P/Encke meteoroid streams.
M. Moroni, A. Milillo, A. Mura, A. A. Christou, P. Pokorný, V. Mangano, A. Berezhnoy, A. Aronica, A. Brin, E. De Angelis, P. P. Di Bartolomeo, A. Kazakov, S. Massetti, S. Orsini, C. Plainaki, G. Richards, R. Rispoli, R. Sordini, M. Stumpo   +18 more
wiley   +1 more source

Oort Cloud Comets: Perturbations Due to the Passage of Gliese 710

Universe
The outermost region of the Solar System is called the Oort cloud, which is the Solar System’s reservoir of long-period comets that extends to distances up to 200,000 au from the Sun.
Elke Pilat-Lohinger, Maximilian Zimmermann, Birgit Loibnegger   +2 more
doaj   +1 more source