Results 111 to 120 of about 8,064,980 (248)

Comet 289P/Blanpain: Near-perihelion Activity and the Phoenicids

open access: yesThe Astronomical Journal
We present NEOWISE observations of Jupiter family comet 289P/Blanpain, the parent body of the Phoenicid meteoroid stream. Near-infrared images at 3.4 μ m (W1) and 4.6 μ m (W2) were obtained near perihelion on two occasions: UT 2019 October 30 (inbound ...
Toshihiro Kasuga
doaj   +1 more source

Experimental Sleep Restriction Blunts Positive Emotions and Aesthetic Experiences When Viewing Artwork

open access: yesJournal of Sleep Research, EarlyView.
ABSTRACT Sleep loss influences basic emotional and cognitive processes, but its impact on higher‐order naturalistic cognition, such as aesthetic judgements, is less understood. The current study primarily investigated whether experimental sleep restriction altered aesthetic evaluations of abstract artwork, and secondarily tested whether these ...
Ariadne D. Godinho   +3 more
wiley   +1 more source

Nucleus Ice Associations in Comets Derived from Spatially Resolved Properties of Volatile Gases in the Coma

open access: yesThe Planetary Science Journal
Under favorable conditions, high-resolution long-slit infrared spectroscopic observations of comets can provide information on how ices are associated within the nucleus from spatially resolved properties of volatiles in the coma.
N. Dello Russo   +10 more
doaj   +1 more source

Xenoliths in meteorites: Insights into the dynamics of material exchange between asteroids

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non‐carbonaceous (NC) reservoirs ...
J. Gattacceca   +17 more
wiley   +1 more source

On the Border: Searching for Cometary Activity near the Centaur–JFC Transition Line

open access: yesThe Planetary Science Journal
Current wide-field surveys discover ∼15 Jupiter-family comets (JFCs) each year, typically identified via visual detection of a dust coma or tail. The same surveys also discover many asteroids that have distant JFC-like orbits, but with no reported ...
A. Fraser Gillan   +4 more
doaj   +1 more source

Are Trojan collisional families a source for short--period comets?

open access: yes, 1995
We have investigated the dynamical evolution of fragments generated by the impact breakup of Trojan asteroids, in order to study the formation of collisional families in the Trojan clouds and to identify a possible genetic connection between these ...
VANZANI V.   +2 more
core  

Jasmonate biosynthesis regulates key events in barley vegetative and reproductive development

open access: yesNew Phytologist, EarlyView.
Generation and general phenotypes of hvaoc mutants. Summary Cereal grain is a global food staple. Filial tissues in grain, such as the embryo and endosperm, grow embedded in the maternal ovule and surrounding ovary wall. Maternal tissues provide nutrition and protection but are progressively reduced and degraded as filial tissues expand, driving grain ...
Jian Luo   +17 more
wiley   +1 more source

Covertly Active Comet (139359) 2001 ME1

open access: yesThe Planetary Science Journal
On 2018 November 18, coronagraphs onboard the Solar and Heliospheric Observatory (SOHO) captured an unrecognized comet crossing its fields of view. We identified this comet to be the minor planet (139359) 2001 ME _1 , whose previously unnoticed dust ...
Qicheng Zhang   +5 more
doaj   +1 more source

A survey of possible missions to the periodic comets in the interval 1974 - 2010 [PDF]

open access: yes, 1974
Catalogs are developed to survey the mission possibilities for the short period comets. In the first the physical and pertinent orbital characteristics are given for 65 short period comets. The second catalog is one containing the predicted perihelia for
Bender, D. F.
core  

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