Results 51 to 60 of about 76,745 (212)
Diversity, 2023 Xyloplax is a genus of three species of sea stars previously found only on sunken wood in the deep ocean. Their circular and petaloid bodies, which lend them their common name “sea daisy”, and their presumed exclusive diet of wood make them an unusual ...
Cheyenne Y. Payne +8 more
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AerospaceThe increasing need for autonomy in space exploration missions is becoming more and more relevant in the design of missions to small bodies. The long communication latencies and sensitivity of the system to unplanned environmental perturbations mean ...
Pelayo Peñarroya +3 more
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Hayabusa2 mission status: Landing, roving and cratering on asteroid Ryugu
Acta Astronautica, 2020 Hayabusa2 arrived at the C-type asteroid Ryugu in June 2018. During one and a half year of the Ryugu-proximity operation, we succeeded in two rovers landing, one lander landing, two spacecraft touchdown/sample collection, one kinetic impact operation and
Y. Tsuda +5 more
semanticscholar +1 more source
MONET: The Minor Body Generator Tool at DART Lab
SensorsMinor bodies exhibit considerable variability in shape and surface morphology, posing challenges for spacecraft operations, which are further compounded by highly non-linear dynamics and limited communication windows with Earth.
Carmine Buonagura +2 more
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THE CONDITIONS FOR APOPHIS 99942 APPROACHING EARTH IN 2029
Odessa Astronomical Publications, 2009 The discovery of Apophis 99942 asteroid in 2004 raised a number of questions in the sphere of the asteroid threatening. On April 13, 2029, the asteroid is to pass at a close distance from Earth.
A. A. Tokovenko, А. А. Bazey
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Near-Earth Asteroids as Possible Parent Bodies of Meteor Streams [PDF]
Учёные записки Казанского университета: Серия Естественные науки, 2016 The genetic relationship of meteor streams with near-Earth asteroids (NEAs) is being actively studied. A genetic link with the asteroid is possible only for streams in which meteoroids have the geocentric speed smaller than 50 km/s, thereby meaning the ...
M.G. Sokolova, M.V. Sergienko
doaj
Erosion Rate Measurements for DART Spacecraft Ion Propulsion System
Applied Sciences, 2022 The Double Asteroid Redirection Test (DART) spacecraft was developed to provide the first measurement for orbital deflection of an asteroid upon intentional impact. The NEXT ion engine is part of the mission, on its maiden voyage.
Mark W. Crofton +3 more
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The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy
Science, 2019 Hayabusa2 at the asteroid Ryugu Asteroids fall to Earth in the form of meteorites, but these provide little information about their origins. The Japanese mission Hayabusa2 is designed to collect samples directly from the surface of an asteroid and return
K. Kitazato +63 more
semanticscholar +1 more source
Asteroid impact, not volcanism, caused the end-Cretaceous dinosaur extinction
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance We present a quantitative test of end-Cretaceous extinction scenarios and how these would have affected dinosaur habitats. Combining climate and ecological modeling tools, we demonstrate a substantial detrimental effect on dinosaur habitats ...
Alfio Alessandro Chiarenza +6 more
semanticscholar +1 more source
Advanced Science, EarlyView.The sea cucumber Holothuria leucospilota detects blue and adjacent wavelengths of light via an r‐opsin with a maximum absorption at 459 nm. In the oral tentacles, papillae, and tube feet, distinct light‐sensing structures with specialized morphologies are formed, constituting a unique pentaradial and bilateral combined photoreception system.
Jiasheng Huang +20 more
wiley +1 more source