Results 71 to 80 of about 91,815 (175)
Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks
The Astronomical JournalWe present optical observations of the Halley-type comet 12P/Pons–Brooks (12P) on its approach to perihelion. The comet was active even in the first observations at ∼8 au.
David Jewitt, Jane Luu
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Down But Not Out: The Case of Long-period Comet C/2021 O3 (Panstarrs)
The Astronomical JournalWe combine ground- and space-based observations of long-period comet C/2021 O3 (Panstarrs; perihelion distance 0.287 au) in order to investigate its reported near-perihelion destruction.
David Jewitt +3 more
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Single Cell Analysis of Human RAD18-Dependent DNA Post-Replication Repair by Alkaline Bromodeoxyuridine Comet Assay [PDF]
, 2013 Damage to DNA can block replication progression resulting in gaps in the newly synthesized DNA. Cells utilize a number of post-replication repair (PRR) mechanisms such as the RAD18 controlled translesion synthesis or template switching to overcome the ...
Himabindu Gali +14 more
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The Astrophysical JournalInterstellar comet 3I/ATLAS shows unusual volatile activity, including strong H _2 O, CO, and CO _2 production and a delayed postperihelion detection of CH _4 .
Akshat Rawat, Kinsuk Acharyya
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Dust and Volatiles in the Disintegrating Comet C/2019 Y4 (ATLAS)
The Astrophysical JournalC/2019 Y4 (ATLAS) is an Oort cloud comet with an orbital period of ∼5895 yr. Starting in 2020 March, its nucleus underwent disintegration. In order to investigate the gas and dust properties of C/2019 Y4 (ATLAS) during its disintegration, we obtained ...
Ruining Zhao +6 more
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The Astronomical JournalComet C/2017 K2 (Pan-STARRS) provided a rare opportunity to investigate the evolution of coma composition and outgassing patterns over a transitional heliocentric distance ( R _h ) range where activity drivers in comets are thought to change from ...
Chemeda Ejeta +13 more
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Progress towards COMET Phase-I [PDF]
, 2015 The COMET experiment is designed to search for flavour violation in the charged lepton sector, via the coherent neutrinoless process +A e+A, which can probe a wide variety of BSM physics. Using the new high-power proton beam at J-PARC, the sensitivity of
COMET Collaboration, . +1 more
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On the Early Thermal Processing of Planetesimals during and after the Giant Planet Instability
The Planetary Science JournalBorn as ice-rich planetesimals, cometary nuclei were gravitationally scattered onto their current orbits in the Kuiper Belt and the Oort Cloud during the giant planets’ dynamical instability in the early stages of our solar system’s history.
Anastasios Gkotsinas +4 more
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Ptolemy - a GCMS to measure the chemical and stable isotopic composition of a comet
, 2009 Comets have captured the imagination for as long as man-kind has looked up to the heavens. The successful launch of the Rosetta mission, in March 2004, means that for the first time in situ analyses of the chemical and isotopic composition of a cometary
Wright, Ian +7 more
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The Planetary Science JournalWe present measurements, analyses, and results for the 17 strongly carbon-chain depleted comets in Lowell Observatory’s narrowband photometry database.
Allison N. Bair, David G. Schleicher
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