Results 41 to 50 of about 9,036 (120)

Global Ionospheric TEC Map Prediction Based on Multichannel ED-PredRNN

open access: yesAtmosphere
High-precision total electron content (TEC) prediction can improve the accuracy of the Global Navigation Satellite System (GNSS)-based applications.
Haijun Liu   +8 more
doaj   +1 more source

Size–Frequency Distribution of Terrestrial Leftover Planetesimals and S-complex Implanted Asteroids

open access: yesThe Astrophysical Journal
The isotopic composition of meteorites linked to S-complex asteroids has been used to suggest that these asteroids originated in the terrestrial planet’s region, i.e., within 1.5 au, and later got implanted into the main asteroid belt (MAB).
Rogerio Deienno   +5 more
doaj   +1 more source

Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica

open access: yesScientific Data
We present Bedmap3, the latest suite of gridded products describing surface elevation, ice-thickness and the seafloor and subglacial bed elevation of the Antarctic south of 60 °S.
Hamish D. Pritchard   +81 more
doaj   +1 more source

Accurate geometric albedo, shape, and size of Hi’iaka from a stellar occultation

open access: yesNature Communications
Stellar occultations, when a distant object passes in front of a star and casts a shadow on Earth, are a powerful tool to probe the physical properties of solar system bodies.
Estela Fernández-Valenzuela   +73 more
doaj   +1 more source

Weywot, an Unusually Low-albedo Satellite in the Trans-Neptunian Region

open access: yesThe Astrophysical Journal Letters
Weywot is the largest satellite of the candidate dwarf planet Quaoar, which also hosts a remarkable ring system located beyond its Roche limit—a configuration that challenges conventional understanding of ring dynamics.
Estela Fernández-Valenzuela   +42 more
doaj   +1 more source

TESS Photometry and Radial-velocity Analysis of the Sub-Neptune Exoplanet π Mensae c and the Wider π Mensae Planetary System

open access: yesThe Astronomical Journal
Exoplanet characterization relies on precise measurements of planetary orbital and physical parameters. This is particularly important for planetary dynamics and atmospheric evolution, as orbital parameters help constrain system evolution, resolve ...
Skylar S. Larsen   +12 more
doaj   +1 more source

Geology and formation of titaniferous placer deposits in Upper Jogaz Valley area, Fanuj, Sistan and Baluchestan province, Iran

open access: yesJournal of Economic Geology, 2015
Introduction The Fanuj titaniferous placer deposits are located 35 km northwest of the Fanuj, Sistan and Baluchestan province (1) . The studied area comprises a (2) small part of the late Cretaceous Fanuj-Maskutan (Rameshk) ophiolite complex (Arshadi ...
Seyed Javad Moghaddasi, Javad Yazdi
doaj  

The Rings of (2060) Chiron: Evidence of an Evolving System

open access: yesThe Astrophysical Journal Letters
The centaur (2060) Chiron has long been a candidate for hosting material in orbit, based on occultation and photometric and spectroscopic data. Here, we present a multichord stellar occultation observed on 2023 September 10 UT that reveals new and ...
C. L. Pereira   +56 more
doaj   +1 more source

NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)

open access: yesThe Astrophysical Journal Letters
We report on the observation and measurement of astrometry, photometry, morphology, and activity of the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS) with the NSF-DOE Vera C. Rubin Observatory.
Colin Orion Chandler   +305 more
doaj   +1 more source

Dynamic controls on subsurface water chemistry and habitability on icy moons. [PDF]

open access: yesInnovation (Camb)
Zhang C   +8 more
europepmc   +1 more source

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