Results 91 to 100 of about 34,434 (269)
The Anatomical Record, Volume 308, Issue 12, Page 3197-3229, December 2025.Abstract Plutonium was discovered and first synthesized in the early 1940's. Several isotopes of plutonium are used in nuclear technologies, 238Pu for heat generation and 239Pu for energy production and weapons. Both isotopes emit alpha particles, which pose a significant radiation hazard when incorporated into the body.
Scott C. Miller
wiley +1 more source
Different Inhomogeneous Evolutionary Histories for Uranus and Neptune
The Astrophysical Journal LettersWe present updated nonadiabatic and inhomogeneous evolution models for Uranus and Neptune, employing an interior composition of methane, ammonia, water, and rocks.
Roberto Tejada Arevalo
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Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.Abstract The Solar, Anomalous, and Magnetospheric Explorer (SAMPEX) mission launched in July 1992 was the first NASA “Small Explorer” project. It had the goal to show how space missions could be developed much more rapidly than had become the situation in the 1980s and 1990s.
D. N. Baker, G. M. Mason
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Probing methane in Uranus’ upper stratosphere using HST observations of the 1280 Å Raman feature
Astronomy & AstrophysicsWe analysed far-ultraviolet (FUV) spectra of Uranus obtained by the HST STIS and COS instruments in 2012 and 2014, respectively, to determine the brightness of Raman-scattered Lyman-alpha (Lyα) emissions centred at 1280 Å (hereafter, the Raman feature ...
Joshi Sushen +6 more
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, 1974 Recommendations for a 1979 Mariner Jupiter-Uranus mission are discussed with the possibility of launching the first outer planet atmospheric entry probe.
Moore, J.
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Formation and Dynamical Evolution of the Neptune Trojans - the Influence of the Initial Solar System Architecture [PDF]
, 2010 In this work, we investigate the dynamical stability of pre-formed Neptune Trojans under the gravitational influence of the four giant planets in compact planetary architectures, over 10 Myr.
Alibert +36 more
core +4 more sources
Noble Gas Planetology and the Xenon Clouds of Uranus
The Planetary Science JournalNoble gases provide tracers of cosmic provenance that are accessible to a future Uranus atmospheric probe. Argon and krypton are expected to be well mixed on Uranus with respect to H _2 and He, although condensation at the winter pole may be possible ...
Kevin Zahnle
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THE WAVE PRINCIPLE OF THE DISTRIBUTION OF SUBSTANCE IN SOLAR SYSTEM
Odessa Astronomical Publications, 2017 The wave principle of planet system formation and systems of satellites of Jupiter, Saturn and Uranus in the Solar system are considered.
V. A. Smirnov
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The Ionosphere of Uranus as Revealed by JWST
Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.Abstract The first spectroscopic observations of Uranus by the James Webb Space Telescope were obtained in January 2023. Using these observations, we explored the physical properties of the planet's ionosphere through the analysis of near‐infrared H3+ ${\mathrm{H}}_{3}^{+}$ spectra.
Henrik Melin +13 more
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Observations of Uranus at High Phase Angle as Seen by New Horizons
The Planetary Science JournalWe present flux measurements of Uranus observed at phase angles of 43.°9, 44.°0, and 52.°4 by the Multispectral Visible Imaging Camera on the New Horizons spacecraft during 2023, 2010, and 2019, respectively.
Samantha N. Hasler +16 more
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