Results 11 to 20 of about 302 (163)

Phylogenetic evaluation of the taxonomic status of Timandra griseata and T. comae (Lepidoptera: Geometridae: Sterrhinae)

open access: yesEuropean Journal of Entomology, 2005
The sterrhine loopers Timandra griseata and T. comae have been treated as distinct species since 1994. However, morphological differences between the taxa are minor and therefore their status has often been disputed.
Erki ÕUNAP   +2 more
doaj   +1 more source

In a coma [PDF]

open access: yesBritish Journal of Psychiatry, 2014
The Los Angeles-based hard-rock band Guns N’ Roses released Use Your Illusion albums (I and II) at the height of their fame. Their lesser known but no less monstrous song Coma , from album I, has no chorus, is more than 10 minutes long and is in five distinct parts.
openaire   +2 more sources

MIR Spectra and Analysis of Jovian Trojan Asteroids

open access: yesThe Planetary Science Journal, 2023
Jovian Trojan asteroids make up a large group of primitive bodies that populate Jupiter's L4 and L5 Lagrange points. The Trojans’ dynamics and composition carry insight into the formation mechanisms that shaped our solar system. Mid-infrared (MIR; 5–35 μ
Audrey C. Martin, Joshua P. Emery
doaj   +1 more source

Organic synthesis applied to space sciences

open access: yesEPJ Web of Conferences, 2012
About 160 molecules have been detected in the interstellar medium, the comae and the atmospheres of planets. The presence of these compounds leads to imagine a chemistry of these media to explain the formation of these species and to predict the possible
Guillemin J.-C.
doaj   +1 more source

Coma Abundances of Volatiles at Small Heliocentric Distances: Compositional Measurements of Long-period Comet C/2020 S3 (Erasmus)

open access: yesThe Astronomical Journal, 2023
We report production rates of H _2 O and nine trace molecules (C _2 H _6 , CH _4 , H _2 CO, CH _3 OH, HCN, NH _3 , C _2 H _2 , OCS, and CO) in long-period comet C/2020 S3 (Erasmus) using the high-resolution, cross-dispersed infrared spectrograph (iSHELL)
Chemeda Ejeta   +11 more
doaj   +1 more source

THE RELATIVE WAVELENGTH INDEPENDENCE OF IR LAGS IN ACTIVE GALACTIC NUCLEI: IMPLICATIONS FOR THE DISTRIBUTION OF THE HOT DUST

open access: yesOdessa Astronomical Publications, 2016
We show that, contrary to simple predictions, most AGNs show at best only a small increase of lags in the J, H, K, and L bands with increasing wavelength.
V. L. Oknyansky   +2 more
doaj   +1 more source

Comet P/2021 HS (PANSTARRS) and the Challenge of Detecting Low-activity Comets

open access: yesThe Planetary Science Journal, 2023
Jupiter-family comet (JFC) P/2021 HS (PANSTARRS) only exhibits a coma within a few weeks of its perihelion passage at 0.8 au, which is atypical for a comet.
Quanzhi Ye   +10 more
doaj   +1 more source

Modeling exospheres: analytical and numerical methods with application examples

open access: yesFrontiers in Astronomy and Space Sciences
Exospheres, the tenuous gas environments surrounding planets, planetary satellites, and cometary comae, play a significant role in mediating the interactions of these astronomical bodies with their surrounding space environments.
Valeriy Tenishev   +5 more
doaj   +1 more source

X-Rays Trace the Volatile Content of Interstellar Objects

open access: yesThe Astrophysical Journal, 2023
The nondetection of a coma surrounding 1I/‘Oumuamua, the first discovered interstellar object (ISO), has prompted a variety of hypotheses to explain its nongravitational acceleration.
Samuel H. C. Cabot   +2 more
doaj   +1 more source

Dust Properties of Comets Observed by Spitzer

open access: yesThe Planetary Science Journal, 2023
As comets journey into the inner solar system, they deliver particulates and volatile gases into their comae that reveal the most primitive materials in the solar system.
David E. Harker   +3 more
doaj   +1 more source

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