Results 91 to 100 of about 18,971,872 (256)

Thermal history of an amoeboid olivine aggregate in the early solar nebula

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Carbonaceous chondrites commonly contain amoeboid olivine aggregates (AOAs). Here, we investigated an AOA in the CR chondrite Y‐793261. This AOA contains an unstable assemblage of forsterite and quartz. We found a rare occurrence of enstatite and quantitatively discuss its formation process.
M. Kimura   +3 more
wiley   +1 more source

Perihelion Asymmetry in the Water Production Rate of the Interstellar Object 3I/ATLAS

open access: yesThe Astrophysical Journal Letters
3I/ATLAS is an interstellar object whose activity provides critical insights into its composition and origin. However, due to its orbital geometry, the object is too close to the Sun near perihelion to be observed from the ground, and space-based ...
Hanjie Tan, Xiaoran Yan, Jian-Yang Li
doaj   +1 more source

Spatiotemporal Analysis of Dust Devils in the Preselected Landing Area for Tianwen-3: A Case Study of Chryse Planitia

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Tianwen-3 Mars Sample Return Mission is scheduled for launch in 2028, with a return expected in ∼2030. Dust devils (DDs) play a crucial role in the thermal structure of the Martian atmospheric boundary layer. Additionally, the formation process of
Yu Yang   +4 more
doaj   +1 more source

Radar Astronomy of Solar System Plasmas, Scientific Report No. 4 [PDF]

open access: yes, 1964
Radar astronomy applied to cislunar, solar, interplanetary, ionospheric, and atmospheric ...
Von Eshleman, R.
core  

Orbital and Absolute Magnitude Distribution of Hilda Population

open access: yesThe Astronomical Journal
The Hilda population of asteroids is located in a large orbital zone of long-term stability associated with the Jupiter J3/2 mean-motion resonance. They are a sister population of the Jupiter Trojans, since both of them are likely made up of objects ...
David Vokrouhlický   +6 more
doaj   +1 more source

Astronomy Without a Telescope

open access: yes, 2001
Created by author Nick Strobel, "Astronomy Notes" is an educational resource for introductory astronomy classes for undergraduates. This section describes: the celestial sphere, coordinate systems, the motion of the stars.
Strobel, Nick
core  

Methods for substituting onsite ambient ultraviolet radiation measurements for personal exposure studies

open access: yesPhotochemistry and Photobiology, EarlyView.
Three methods for substituting on‐site ambient ultraviolet radiation measurements for personal exposure measurements were investigated. Assuming spatial persistency of measurements from high‐grade instruments delivers lowest uncertainties up to distances of 82 km.
F. Lubitz   +7 more
wiley   +1 more source

Astronomy Online

open access: yes
This website, authored by Ricky Leon Murphy of Astronomy Online, is a collection of references, images, and information for general astronomy. This work covers topics from the basics of science and observation through the solar system, stars, cosmology ...
Murphy, Ricky Leon
core  

MACHINE LEARNING FOR SMALL BODIES IN THE SOLAR SYSTEM

open access: yes
Machine Learning for Small Bodies in the Solar System provides the latest developments and methods in applications of Machine Learning (ML) and Artificial Intelligence (AI) to different aspects of Solar System bodies, including dynamics, physical ...
Smirnov, Evgeny   +2 more
core   +1 more source

On Our Cosmic (In)significance

open access: yesRatio, EarlyView.
ABSTRACT This article discusses three interpretations of cosmic significance, all of which reveal something important about the notion of significance. Along the way, it proposes a unified view of significance by combining elements of each of the views.
Oskari Sivula
wiley   +1 more source

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