Results 91 to 100 of about 16,106 (245)

ASTEROIDS SEARCH RESULTS IN DIGITIZED OBSERVATIONS OF THE NORTHERN SKY SURVEY PROJECT (KITAB PART)

open access: yesOdessa Astronomical Publications, 2018
Photographic observations of XX century contained numerous and varied information about all objects and events of the Universe fixed on the astronegatives.
S. V. Shatokhina   +5 more
doaj   +1 more source

Early evolutionary history of the seed

open access: yesBiological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman   +2 more
wiley   +1 more source

Candidate Main-belt Asteroids for Surface Heterogeneity

open access: yesThe Astronomical Journal
Large terrestrial bodies in our solar system like the Earth, Mars, Mercury, and the Moon exhibit geologically complex surfaces with compositional heterogeneity.
Sunao Hasegawa   +12 more
doaj   +1 more source

Assessment of Flyby Methods as Applied to Close Encounters among Asteroids

open access: yesAerospace
Orbital flybys have been extensively studied for spacecraft missions, resulting in effective mathematical and physical models. However, these models’ applicability to natural encounters involving asteroids has not been explored.
Nicolò Stronati   +3 more
doaj   +1 more source

Biogeography of intertidal invertebrates is influenced by latitude along the west coast of Australia

open access: yesEcography, Volume 2026, Issue 6, June 2026.
Along the west coast of Australia, intertidal rock platforms support high invertebrate diversities that provide vital ecosystem services, yet patterns in diversity are not well understood. Here, we document and examine the invertebrate assemblages on intertidal rock platforms in Western Australia and delineate ecoregions according to assemblage ...
Matilda Murley   +2 more
wiley   +1 more source

Unusual Space Weathering on a CE-5 Metal Grain Indicates Deceptive Surface Signatures of M-type Asteroids

open access: yesThe Astrophysical Journal Letters
M-type asteroids are historically thought to be exposed metallic cores of differentiated planets with a composition dominated by pure iron and nickel. However, recent spectral and radar observations reveal an insufficient number of M-type asteroids in ...
Tian Zhang   +7 more
doaj   +1 more source

Utilizing Citizen Contribution to Track Cosmic Material Entry into Earth's Atmosphere: Insights from Mexico

open access: yesGeofísica Internacional
In this paper, the importance of information posted on social networks in the study of meteoroid entry into the Earth’s atmosphere is shown. This kind of networks work thanks to the information shared by many people, which is stored on different servers.
Arturo Cuevas Muñóz   +2 more
doaj   +1 more source

Photoluminescence and Cathodoluminescence of the Solid Cometary Substance

open access: yesOpen Astronomy, 2019
We have proposed that solar ultraviolet and corpuscular radiations may excite photoluminescence and cathodoluminescence of the solid cometary substance including mineral halos of comets.
Simonia Irakli, Gucsik Arnold
doaj   +1 more source

Finding the aten asteroids posing potential danger for Earth

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2007
We made the research of orbit evolutions of 321 aten asteroids on the 400 years time interval (1800–2200). We found five asteroids which come close to the Earth at a distance less than 150000 km.
S. S. Denisov
doaj   +1 more source

Lifetime Physical Loading and Magnetic Resonance‐Derived Intervertebral Disc Health in Adults With Chronic Low Back Pain: A Cross‐Sectional Study

open access: yesJOR SPINE, Volume 9, Issue 2, June 2026.
Final multiple linear regression model: heat maps showing Bone‐specific Physical Activity Questionnaire score associations with T2 values in five intervertebral disc (IVD) regions with statistically significant covariates controlled for at individual spinal levels.
Claire L. Samanna   +12 more
wiley   +1 more source

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