Results 71 to 80 of about 21,905 (255)
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 +5 more
wiley +1 more source
AerospaceAdvances in the field of asteroid dynamics continue to yield new knowledge regarding the behavior and characteristics of asteroids, allowing unprecedented levels of accuracy for predicting trajectories and contributing to impact avoidance strategies ...
Evie Kendal, Tony Milligan, Martin Elvis
doaj +1 more source
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 +6 more
wiley +1 more source
Gravitational capture opportunites for asteroid retrieval missions [PDF]
, 2012 Asteroids and comets are of strategic importance for science in an effort to uncover the formation, evolution and composition of the Solar System. Near-Earth objects (NEOs) are of particular interest because of its accessibility from Earth, but also ...
Alessi, Elisa Maria +3 more
core
Experimental Physiology, EarlyView.Abstract Despite exercise countermeasures to sustain health and performance in spaceflight, complete maintenance of muscle mass and functions in microgravity is still not possible for most astronauts. The principal cause of the limited effectiveness of existing exercise countermeasures is the difficulty in achieving full loading forces in space.
Alessandra Bosutti +6 more
wiley +1 more source
Dimorphos Orbit Determination from Mutual Events Photometry
The Planetary Science JournalThe NASA Double Asteroid Redirection Test spacecraft successfully impacted the Didymos–Dimorphos binary asteroid system on 2022 September 26 UTC.
Peter Scheirich +8 more
doaj +1 more source
Accretion and Uneven Depletion of the Main Asteroid Belt
The Planetary Science JournalThe main asteroid belt (MAB) is known to be primarily composed of objects from two distinct taxonomic classes, generically defined here as S- and C-complex.
Rogerio Deienno +5 more
doaj +1 more source
Scaling forces to asteroid surfaces: The role of cohesion
, 2010 The scaling of physical forces to the extremely low ambient gravitational acceleration regimes found on the surfaces of small asteroids is performed. Resulting from this, it is found that van der Waals cohesive forces between regolith grains on asteroid ...
Hartzell, C. M. +3 more
core +1 more source
Dynamics of rotationally fissioned asteroids: non-planar case [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 The rotational fission of asteroids has been studied previously with simplified models restricted to planar motion. However, the observed physical configuration of contact binaries leads one to conclude that most of them are not in a planar configuration and hence would not be restricted to planar motion once they undergo rotational fission.
Boldrin, L. A G +2 more
openaire +2 more sources
The Cumulation of Debris Clouds around a Fast-rotating Asteroid
The Astrophysical JournalThe 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 +5 more
doaj +1 more source