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How Meteor Showers Can Guide the Search for Long-period Comets [PDF]
The Planetary Science JournalWith orbital periods longer than 200 yr, most long-period comets (LPCs) remain undiscovered until they are in-bound toward perihelion. The comets that pass close to Earth’s orbit are potentially hazardous objects.
Samantha Hemmelgarn +3 more
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CO and CO2 Productions Rates of Comets Observed by NEOWISE within Year 1 of the Reactivated Mission
The Planetary Science Journal, 2023 We report on the observed fluxes of the comets detected by NEOWISE during the first year of operations after the spacecraft’s reactivation. The sample included 57 comets.
Adeline Gicquel +4 more
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Use of lung ultrasound in the differential diagnosis of the causes of dyspnea [PDF]
Vojnosanitetski Pregled, 2023 Background/Aim. The field of lung ultrasonography (US) is a fast-developing one, and it provides the medical community with numerous new diagnostic opportunities.
Bulatović Kristina +11 more
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Organic Matter in Cometary Environments
Life, 2021 Comets contain primitive material leftover from the formation of the Solar System, making studies of their composition important for understanding the formation of volatile material in the early Solar System.
Adam J. McKay, Nathan X. Roth
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Universe, 2022 Questions regarding how primordial or pristine the comets of the solar system are have been an ongoing controversy. In this review, we describe comets’ physical evolution from dust and ice grains in the solar nebula to the contemporary small bodies in ...
Jürgen Blum +2 more
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Possible Transfer of Life by Earth-Grazing Objects to Exoplanetary Systems
Life, 2020 Recently, a 30-cm object was discovered to graze the Earth’s atmosphere and shift into a Jupiter-crossing orbit. We use the related survey parameters to calibrate the total number of such objects.
Amir Siraj, Abraham Loeb
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Impacts drive lunar rockfalls over billions of years
Nature Communications, 2020 In this study, the authors present a global map of rockfalls on the lunar surface and determine impact events as short- and long-term driver for rockfall events.
Valentin Tertius Bickel +4 more
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General Relativistic Study of Motion of Comets Particles Elliptical Gravitational Field [PDF]
Physics AccessComets are small bodies consisting of aggregates of ice mixed with rock and dust. They are usually influenced by galactic forces and stellar encounters, and may have contributed to the formation of ice giants and transport gases across the solar system ...
Timothy Bulus +3 more
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The Astrophysical Formation of Asymmetric Molecules and the Emergence of a Chiral Bias
Life, 2019 The biomolecular homochirality in living organisms has been investigated for decades, but its origin remains poorly understood. It has been shown that circular polarized light (CPL) and other energy sources are capable of inducing small enantiomeric ...
Adrien D. Garcia +5 more
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Mechanical Properties of Cometary Surfaces
Universe, 2022 Mechanical properties, in particular, strength (tensile, shear, compressive) and porosity, are important parameters for understanding the evolution and activity of comets. However, they are notoriously difficult to measure.
Jens Biele +2 more
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