Results 61 to 70 of about 10,898 (231)

What If Planet Nine Has Satellites?

The Astrophysical Journal, 2023
In the past decade, numerical simulations started to reveal the possible existence of Planet Nine in our solar system. The Planet Nine scenario can provide an excellent explanation for the clustering in orbital elements for Kuiper Belt objects.
Man Ho Chan
doaj   +1 more source

Designs of multi-spacecraft swarms for the deflection of apophis by solar sublimation [PDF]

, 2009
This paper presents two conceptual designs of multi-spacecraft swarms used for deflecting Apophis. Each spacecraft is equipped with a solar concentrator assembly, which focuses the solar light, and a beaming system that projects a beam of light onto the ...
Maddock, Christie, McInnes, C.R., Radice, Gianmarco, Summerer, Leopold, Vasile, M.   +4 more
core  

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

The Cumulation of Debris Clouds around a Fast-rotating Asteroid

The Astrophysical Journal
The rotational mass loss has been realized to be a prevalent mechanism to produce low-speed debris near the asteroid, and the size composition of the asteroid’s surface regolith has been closely measured by in situ explorations.
Chenyang Huang, Yang Yu, Zhijun Song, Bin Cheng, Patrick Michel, Hexi Baoyin   +5 more
doaj   +1 more source

Shape models and physical properties of asteroids

, 2017
Despite the large amount of high quality data generated in recent space encounters with asteroids, the majority of our knowledge about these objects comes from ground based observations.
A. Cellino, A.R. Dobrovolskis, D. Vokrouhlický, D. Vokrouhlický, D.P. Rubincam, E.J. Öpik, G.W. Wetherill, J. Wisdom, J.L. Elliot, M. Kaasalainen, M. Kaasalainen, M. Viikinkoski, P. Pravec, P. Tanga, R. Connelly, T. Michałowski, T. Santana-Ros, W.F. Bottke   +17 more
core   +1 more source

Small but mighty: Impact hazards from iron Near‐Earth Objects

Meteoritics &Planetary Science, EarlyView.
Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther, Natalia Artemieva, Andrea Schmalen, Kai Wünnemann, Detlef Koschny, Richard Moissl   +5 more
wiley   +1 more source

New evidence on the formation conditions of the Libyan Desert Glass (Western Egypt): Clues from a dendritic zircon inclusion

Meteoritics &Planetary Science, EarlyView.
Abstract Libyan Desert Glass (LDG) is an ~29 million years old, silica‐rich glass found in Western Egypt. Whether this glass formed in an impact cratering context associated with the hypervelocity collision of a cometary/asteroidal body or radiative heating during an airburst is debated. Determination of the formation temperatures and pressures of rare
Niccolò Magnani, Enrico Mugnaioli, Sofia Lorenzon, Lidia Pittarello, Tatiana E. Gorelik, Matteo Masotta, Luigi Folco   +6 more
wiley   +1 more source

A promising view to the Moon: Anticipations for Tianwen-2 samples returned from Kamo’oalewa

Earth and Planetary Physics
The exploration of asteroids has received increasing attention since the 1990s because of the unique information these objects contain about the history of the early solar system. Quasi-satellites are a population of asteroids that co-orbit closely with,
WenZhe Li, Yong Wei, Jian-Yang Li, Wei Yang   +3 more
doaj   +1 more source

An Untargeted Survey of the Rotational Properties of Main-belt Asteroids using the Transiting Exoplanet Survey Satellite (TESS) [PDF]

, 2023
Andrew McNeill, Michael Gowanlock, Michael Mommert, David E. Trilling, Joe Llama, Nicholas Paddock   +5 more
openalex   +1 more source

Orbital debris removal with solar concentrators [PDF]

, 2010
In 1993 solar concentrators were first proposed to deflect asteroids away from a collision course with the Earth. The original concept was expanded by the authors, and proved to be effective and technologically feasible.
Maddock, Christie, Saunders, C., Vasile, Massimiliano   +2 more
core