Results 11 to 20 of about 10,510,627 (209)

Finding the imprints of stellar encounters in long-period comets [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
The solar system's Oort cloud can be perturbed by the Galactic tide and by individual passing stars. These perturbations can inject Oort cloud objects into the inner parts of the solar system, where they may be observed as the long-period comets (periods longer than 200 years).
Feng, Fabo, Bailer-Jones, C. A. L.
openaire   +4 more sources

Inbound evolution of 21 long period comets

Monthly Notices of the Royal Astronomical Society
ABSTRACT We characterize dust activity and nucleus properties of long-period comets during their inbound journey to the inner Solar system, thus supporting the target selection and risk assessment for ESA Comet Interceptor mission. We observed and modelled the dust tails of 21 Oort cloud comets by means of the probabilistic tail model,
Ivano Bertini, M Fulle, E Mazzotta Epifani, S Fiscale, L Inno, A Rotundi, C Tubiana, V Della Corte, F Ferrigno, C Magliano, G Portelli, M Scuderi, L Tonietti, A Ferone, P Ochner, E Ammannito, C Grappasonni, G Sindoni, A Aletti, P Bacci, G Baj, F Bellini, E Bryssinck, D Carosati, M di Grazia, M Facchini, M Feraco, E Guido, F Kugel, R Ligustri, M Maestripieri, G Milani, J Nicolas, L Tinelli, D Tirelli, A Valvasori   +35 more
openaire   +3 more sources

Small-body encounters using solar sail propulsion [PDF]

, 2004
Cometary Rendezvous and Flybys have large V requirements, which impose almost unattainable, and sometimes prohibitive, demands on the propellant budget of conventional, chemical propulsion.
Hughes, Gareth W., McInnes, Colin R.
core   +4 more sources

The transition between long period comets, short period comets and meteoroid streams [PDF]

International Astronomical Union Colloquium, 1985
It has long been realised that Jovian perturbation is the dominant cause of the transition of long period comets (Period > 200 yr) into short period ones (P < 200 yr). When the differences in the detectability of comets in the two groups are taken into account it is clear that the present day flux of long period comets is sufficient to provide ...
openaire   +1 more source

Optical fibre long period grating sensors with nanostructured coatings [PDF]

, 2011
The dual resonant response of long period fibre gratings (LPG) operating near the phase matching turning point to the deposition of nanostructured coatings is explored.
Topliss, Stephen M.
core   +7 more sources

The Oort Cloud and long‐period comets [PDF]

Meteoritics & Planetary Science, 2013
AbstractThis review starts with a brief historical overview of the subject, after which some recent papers attempting to improve the understanding of comet injection from the Oort Cloud and the origin of new comets are discussed. Special attention is paid to the importance of nongravitational effects in comet orbit determination, the synergy between ...
openaire   +1 more source

Anisotropy of long-period comets explained by their formation process [PDF]

The Astronomical Journal, 2020
Long-period comets coming from the Oort cloud are thought to be&#160;planetesimals formed in the planetary region on the ecliptic plane.&#160;We have investigated the orbital evolution of these bodies&#160;due to the Galactic tide.&#160;We extended Higuchi et al.
openaire   +2 more sources

Planetary Trojans – the main source of short period comets? [PDF]

, 2010
One of the key considerations when assessing the potential habitability of telluric worlds will be that of the impact regime experienced by the planet. In this work, we present a short review of our understanding of the impact regime experienced by the ...
Horner, J., J. Horner, Lykawka, P. S., P. S. Lykawka   +3 more
core   +1 more source

Activity of 50 Long-Period Comets Beyond 5.2 AU [PDF]

, 2016
Remote investigations of the ancient solar system matter has been traditionally carried out through the observations of long-period (LP) comets that are less affected by solar irradiation than the short-period counterparts orbiting much closer to the Sun.
Kelemen, János, Csák, B, Szalai, T, Vinkó, J, Marschalkó, Gábor, Székely, Péter, Székely, P, Szakáts, Róbert, Kiss, L. László, Vida, Krisztián, Sárneczky, K, Szabó, GyM, Kiss, LL, Marschalkó, G, Sárneczky, Krisztián, Kelemen, J, Pál, A, Szakáts, R, Szalai, Tamás, Vinkó, József, Szegedi-Elek, E, Szegedi-Elek, Elza, Szabó M., Gyula, Vida, K, Pál, András, Csák, Balázs   +25 more
core   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

Advanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan, Thomas D. Small, Gregory F. Metha, Mahmoud Adel Hamza, Thomas J. O'Dea, Yideng Shen, Cameron J. Shearer   +6 more
wiley   +1 more source