Results 91 to 100 of about 437,551 (293)

SIXTEEN YEARS OF ULYSSES INTERSTELLAR DUST MEASUREMENTS IN THE SOLAR SYSTEM. I. MASS DISTRIBUTION AND GAS-TO-DUST MASS RATIO [PDF]

, 2015
In the early 1990s, contemporary interstellar dust penetrating deep into the heliosphere was identified with the in situ dust detector on board the Ulysses spacecraft. Between 1992 and the end of 2007 Ulysses monitored the interstellar dust stream.
H. Krüger, P. Strub, E. Gruen, V. Sterken   +3 more
semanticscholar   +1 more source

Hidden metallic iron in amorphous silicate dust?

Astronomy & Astrophysics
Context. Amorphous silicate dust is a major component in the interstellar and circumstellar dust formed in the outflow of asymptotic giant branch (AGB) stars.
Enomoto H., Takigawa A., Chihara H., Koike C.   +3 more
doaj   +1 more source

Comet Dust: Connections with Interstellar Dust [PDF]

Symposium - International Astronomical Union, 1989
The Comet Halley campaigns resulted in an enormously better understanding of the composition of comets. Silicates, organic compounds, and volatile ices comprised ofH2O, CO, CO2,S2,CN, and possiblyCH4andOCSoccur in comet grains. These are all known or suspected constituents of interstellar dust.
openaire   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, Volume 27, Issue 22, November 2025.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Exploring the dusty Universe

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2005
Dust is an ubiquitous inhabitant of the interstellar medium, and leaves an unmistakable signature in its optical properties, and physico-chemical evolution.
Borghese, F, Denti, P, Giusto, A, Saija, R, Iati', MA   +4 more
doaj   +1 more source

Joint Modelling of Dust Scattering and Thermal Emission: The Spider Complex

The Astrophysical Journal, 2023
Observations across the electromagnetic spectrum of radiative processes involving interstellar dust—emission, absorption, and scattering—are used to constrain the parameters of dust models and more directly to aid in foreground removal of dust for ...
Jielai Zhang, Peter G. Martin, Ryan Cloutier, Natalie Price-Jones, Roberto Abraham, Pieter van Dokkum, Allison Merritt   +6 more
doaj   +1 more source

SIXTEEN YEARS OF ULYSSES INTERSTELLAR DUST MEASUREMENTS IN THE SOLAR SYSTEM. II. FLUCTUATIONS IN THE DUST FLOW FROM THE DATA [PDF]

, 2015
The Ulysses spacecraft provided the first opportunity to identify and study interstellar dust (ISD) in situ in the solar system between 1992 and 2007. Here we present the first comprehensive analysis of the ISD component in the entire Ulysses dust data ...
P. Strub, H. Krüger, V. Sterken
semanticscholar   +1 more source

Quasi‐Thermal Noise Spectroscopy in Magnetized Space Plasma: Analysis of Wind/WAVES Measurements in Earth's Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Quasi‐thermal noise is measured by an electric antenna embedded in a plasma, and is routinely used to obtain a diagnostic of, for example, the plasma density and electron temperature. Its applications have been so far to a large extent aimed at the analysis of unmagnetized plasmas, for which the plasma‐electron cyclotron frequencies ratio is ...
P. Dazzi, K. Issautier, P. Henri, B. Verkampt   +3 more
wiley   +1 more source

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source

ALMA Reveals Diverse Dust-to-gas Mass Ratios and Quenching Modes in Old Quiescent Galaxies

The Astrophysical Journal Letters
Recent discoveries of dust and molecular gas in quiescent galaxies (QGs) up to z ∼ 4 challenge the long-standing view that the interstellar medium depletes rapidly once star formation ceases, raising key questions of whether dust and gas coevolve in QGs,
G. Lorenzon, D. Donevski, A. W. S. Man, M. Romano, K. E. Whitaker, S. Belli, D. Liu, M. M. Lee, D. Narayanan, A. Long, I. Shivaei, A. Nanni, K. Lisiecki, P. Sawant, G. Rodighiero, I. Damjanov, Junais, R. Davé, C. Pappalardo, C. Lovell, M. Hamed   +20 more
doaj   +1 more source