Results 71 to 80 of about 2,437 (254)

On the Motion of Short-Period Comets in the Neighbourhood of Jupiter [PDF]

Symposium - International Astronomical Union, 1972
An intermediate orbit is developed for studying the hyperbolic jovicentric motion of a comet in the vicinity of Jupiter, where the effect of Jupiter's oblateness may become significant. A comparison is made with some of the results obtained by other investigators on the motions of specific periodic comets.
openaire   +1 more source

A Sub‐Microsecond Switch Enabling SWIFT 23Na Imaging at 10.5 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To enable sodium SWIFT imaging, which is a zero‐echo time imaging technique, at ultra‐high magnetic fields through the development of custom electronics hardware, and to showcase this capability with in vivo imaging results. Methods The custom hardware developed consists of a high‐speed optical trigger with 10 ns resolution, an in‐bore
Russell L. Lagore, Simon Schmidt, Edward J. Auerbach, Naoharu Kobayashi, Christoph Schildknecht, Steen Moeller, Elnaz Mahmoudi Mahmoudalilou, Štefan Zbýň, Jutta Ellermann, Gregor Adriany, Gregory J. Metzger   +10 more
wiley   +1 more source

Physical Observations of the Short-Period Comet 1969 IV [PDF]

Symposium - International Astronomical Union, 1972
The new short-period comet Churyumov-Gerasimenko, discovered by the authors on plates taken by the Kiev University cometary expedition to Alma-Ata in September 1969, was systematically photographed with fast telescopes at Byurakan and Alma-Ata until March 1970.
K. I. Churyumov, S. I. Gerasimenko
openaire   +1 more source

Observational results for eight long-period comets observed far from the Sun [PDF]

, 2013
Context. With this work we start a systematic analysis of the distant activity of several Long Period Comets, in order to investigate the evolution of activity throughout the Solar System and explore differences between comets that pass their perihelion
Mazzotta Epifani, E., Tozzi, G. P., Dall'Ora, M., Mazzotta Epifani, E, PALUMBO, Pasquale, Epifani, E., M. Dall’Ora, Perna, D., Licandro, J., Di Fabrizio, L., Tozzi, G., Palumbo, P., J. Licandro, DELLA CORTE, VINCENZO, P. Palumbo, L. Di Fabrizio, E. Mazzotta Epifani, D. Perna, V. Della Corte, Dall’Ora, M., G. P. Tozzi, Della Corte, V., Snodgrass, C., C. Snodgrass   +23 more
core   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Near-IR Spectroscopic Analysis of the Primary Volatile Composition of Long and Short-Period Comets

, 2023
Comets are among the most well-preserved objects that formed in the protosolar nebula ∼4.5 Gyr ago. Hence, they are important for understanding various aspects of the formation, evolution, and habitability of the solar system. Multiple primary volatiles (
Khan, Younas
core   +2 more sources

Mammalian Osteoderm Ultrastructure in the Armored Acomys Spiny Mouse Tail

Small, EarlyView.
The ultrastructure of armored platelets – termed osteoderms – in the tail skin of Acomys cahirinus spiny mice is characterized using 2D and 3D microscopy methods. The imbricated structure is composed of calcium phosphate biomineral and has select structural elements that are bone‐like and tooth‐like in nature.
Joseph Deering, Malcolm Maden, Marc D. McKee   +2 more
wiley   +1 more source

Multiple Outbursts of Halley-type Comet 12P/Pons–Brooks

The Astronomical Journal
We 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
doaj   +1 more source

The long-term dynamical behavior of short-period comets

, 1993
The orbits of the known short-period comets under the influence of the Sun and all the planets except Mercury and Pluto are numerically integrated. The calculation was undertaken in order to determine the dynamical lifetimes for these objects as well as ...
Levison, Harold F., Duncan, Martin J.
core  

Aligning Real‐Time Recurrence Computational Fluid Dynamics Simulations with Plant Data for the Ruhrstahl–Heraeus Degassing Process of Steel

steel research international, EarlyView.
Uncertainties exist in computational fluid dynamics (CFD) modeling of complex metallurgical processes, even when partly validated by laboratory experiments. rCFD enables computationally efficient prediction of long‐term RH degassing and can be adapted to vary flow conditions.
Xiaomeng Zhang, Maria Thumfart, Roman Rössler, Stefan Pirker   +3 more
wiley   +1 more source