Results 111 to 120 of about 586,778 (202)
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
doaj +1 more source
Micrometeoroid infall onto Saturn's rings constrains their age to no more than a few hundred million years. [PDF]
Sci Adv, 2023 Kempf S +5 more
europepmc +1 more source
The simulation of the outer Oort cloud formation
, 2008 Aims. Considering a model of an initial disk of planetesimals that consists of 10 038 test particles, we simulate the formation of distant-comet reservoirs for the first 1 Gyr. Since only the outer part of the Oort cloud can be formed within this period,
P. A. Dybczyński +4 more
core +1 more source
Analytical Solutions for Planet-scattering Small Bodies
The Astronomical JournalGravitational scattering of small bodies (planetesimals) by a planet remains a fundamental problem in celestial mechanics. It is traditionally modeled within the circular restricted three-body problem, where individual particle trajectories are obtained ...
Yukun Huang +2 more
doaj +1 more source
The Trajectory of 3I/ATLAS Through the Inner Solar System: Close Encounters and Possible Collisions
The Astronomical Journal3I/ATLAS is the third interstellar object (ISO) identified to date. Unlike other known ISOs, 3I/ATLAS travels on a nearly ecliptic, retrograde orbit ( i ≈ 175°).
Anton Pomazan +5 more
doaj +1 more source
Breakup of a long-period comet as the origin of the dinosaur extinction. [PDF]
Sci Rep, 2021 Siraj A, Loeb A.
europepmc +1 more source
A Case Study of Interstellar Material Delivery: α Centauri
The Planetary Science JournalInterstellar material has been discovered in our solar system, yet its origins and details of its transport are unknown. Here, we present α Centauri as a case study of the delivery of interstellar material to our solar system.
Cole R. Gregg, Paul A. Wiegert
doaj +1 more source
Fine-grained interplanetary dust input during the Turonian (Late Cretaceous): evidence from osmium isotope and platinum group elements. [PDF]
Sci Rep, 2023 Matsumoto H +4 more
europepmc +1 more source
On the origin of the Oort cloud
The Astronomical Journal, 1978 S. F. Dermott, T. Gold
openaire +1 more source
On the Origin and Evolution of the Material in 67P/Churyumov-Gerasimenko. [PDF]
Space Sci Rev, 2020 Rubin M +7 more
europepmc +1 more source