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Article
Low surface strength of the asteroid Bennu inferred from impact ejecta deposit
The surface strength of small rubble-pile asteroids, which are aggregates of unconsolidated material under microgravity, is poorly constrained but critical to understanding surface evolution and geologic histo...
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Article
Crater population on asteroid (101955) Bennu indicates impact armouring and a young surface
The impactor-to-crater size scaling relationships that enable estimates of planetary surface ages rely on an accurate formulation of impactor–target physics. An armouring regime, specific to rubble-pile surfac...
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Article
Fine-regolith production on asteroids controlled by rock porosity
Spacecraft missions have observed regolith blankets of unconsolidated subcentimetre particles on stony asteroids1–3. Telescopic data have suggested the presence of regolith blankets also on carbonaceous asteroids...
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Article
Exogenic basalt on asteroid (101955) Bennu
When rubble-pile asteroid 2008 TC3 impacted Earth on 7 October 2008, the recovered rock fragments indicated that such asteroids can contain exogenic material1,2. However, spacecraft missions to date have only obs...
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Author Correction: Shape of (101955) Bennu indicative of a rubble pile with internal stiffness
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Article
Bennu’s near-Earth lifetime of 1.75 million years inferred from craters on its boulders
An asteroid’s history is determined in large part by its strength against collisions with other objects1,2 (impact strength). Laboratory experiments on centimetre-scale meteorites3 have been extrapolated and butt...
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Open AccessIn situ evidence of thermally induced rock breakdown widespread on Bennu’s surface
Rock breakdown due to diurnal thermal cycling has been hypothesized to drive boulder degradation and regolith production on airless bodies. Numerous studies have invoked its importance in driving landscape evo...
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Article
Open AccessCollisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu
Asteroid shapes and hydration levels can serve as tracers of their history and origin. For instance, the asteroids (162173) Ryugu and (101955) Bennu have an oblate spheroidal shape with a pronounced equator, b...
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Article
Publisher Correction: Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Article
Properties of rubble-pile asteroid (101955) Bennu from OSIRIS-REx imaging and thermal analysis
Establishing the abundance and physical properties of regolith and boulders on asteroids is crucial for understanding the formation and degradation mechanisms at work on their surfaces. Using images and therma...
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Article
Craters, boulders and regolith of (101955) Bennu indicative of an old and dynamic surface
Small, kilometre-sized near-Earth asteroids are expected to have young and frequently refreshed surfaces for two reasons: collisional disruptions are frequent in the main asteroid belt where they originate, an...
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Article
The unexpected surface of asteroid (101955) Bennu
NASA’S Origins, Spectral Interpretation, Resource Identification and Security-Regolith Explorer (OSIRIS-REx) spacecraft recently arrived at the near-Earth asteroid (101955) Bennu, a primitive body that represe...
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Article
The dynamic geophysical environment of (101955) Bennu based on OSIRIS-REx measurements
The top-shaped morphology characteristic of asteroid (101955) Bennu, often found among fast-spinning asteroids and binary asteroid primaries, may have contributed substantially to binary asteroid formation. Ye...
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Article
Shape of (101955) Bennu indicative of a rubble pile with internal stiffness
The shapes of asteroids reflect interplay between their interior properties and the processes responsible for their formation and evolution as they journey through the Solar System. Prior to the OSIRIS-REx (Or...
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Article
Open AccessSub-cellular In-situ Characterization of Ferritin(iron) in a Rodent Model of Spinal Cord Injury
Iron (Fe) is an essential metal involved in a wide spectrum of physiological functions. Sub-cellular characterization of the size, composition, and distribution of ferritin(iron) can provide valuable informati...
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Article
OSIRIS-REx: Sample Return from Asteroid (101955) Bennu
In May of 2011, NASA selected the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) asteroid sample return mission as the third mission in the New Frontiers pr...
