Results 1 to 10 of about 25,497 (219)
Nature, 1885 LAST night the nebula in Andromeda was observed here. The stellar-like nucleus was distinctly seen. It appeared to be of a reddish-yellow colour as contrasted with that of the nebula. We think that a change has certainly taken place, no such stellar-like centre having previously been seen in the nucleus.
Rosse
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Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters [PDF]
Galaxies, 2018 The increase in discovered close binary central stars of planetary nebulae is leading to a sufficiently large sample to begin to make broader conclusions about the effect of close binary stars on common envelope evolution and planetary nebula formation ...
Todd Hillwig
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PHL 932: when is a planetary nebula not a planetary nebula? [PDF]
Publications of the Astronomical Society of Australia, 2009 The emission nebula around the subdwarf B (sdB) star PHL 932 is currently classified as a planetary nebula (PN) in the literature. Based on a large body of multi-wavelength data, both new and previously published, we show here that this low-excitation nebula is in fact a small Stromgren sphere (HII region) in the interstellar medium around this star ...
Parker, Quentin A. +3 more
arxiv +7 more sources
Open Veterinary Journal, 2022 Background: Keratitis is a common cause of eye diseases in horses, often resulting in complete loss of vision. Aim: The purpose of the paper is to study the features of the clinical picture of primary and secondary keratitis in horses, depending on the ...
Yuliya Lazareva +2 more
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The Astrophysical Journal, 2023 We studied the PeVatron nature of the pulsar wind nebula (PWN) G75.2+0.1 (“Dragonfly”) as part of our NuSTAR observational campaign of energetic PWNe. The Dragonfly is spatially coincident with LHAASO J2018+3651, whose maximum photon energy is 0.27 PeV ...
Jooyun Woo +7 more
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Recent H-alpha Results on Pulsar B2224+65’s Bow-Shock Nebula, the “Guitar” [PDF]
Journal of Astronomy and Space Sciences, 2016 We used the 4 m Discovery Channel Telescope (DCT) at Lowell observatory in 2014 to observe the Guitar Nebula, an Hα bow-shock nebula around the high-velocity radio pulsar B2224+65.
Timothy Dolch +5 more
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Nebula-Relay Hypothesis: The Chirality of Biological Molecules in Molecular Clouds
Frontiers in Astronomy and Space Sciences, 2022 The chiral puzzle of biological molecules is thought to be closely related to the origin of life and is still a mystery so far. Previously, we proposed a new model on the origin of life, Nebula-Relay hypothesis, which assumed that the life on Earth ...
Lei Feng, Lei Feng, Lei Feng
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VVV-WIT-12 and Its Fashionable Nebula: A 4 yr Long-period Young Stellar Object with a Light Echo?
The Astrophysical Journal Letters, 2023 We report the serendipitous discovery of VVV-WIT-12, an unusual variable source that seems to induce variability in its surrounding nebula. The source belongs to the rare objects that we call WITs (short for What Is This?) discovered within the VISTA ...
Roberto K. Saito +9 more
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Blockchain in Healthcare Today, 2018 In the years since the first human genome was sequenced at a cost of over $3 billion, technological advancements have driven the price below $1,000, making personal genome sequencing affordable to many people. Personal genome sequencing has the potential
Dennis Grishin +10 more
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EVOLUTION OF THE CRAB NEBULA RADIO EMISSION
Odessa Astronomical Publications, 2017 In 1977-1992 the flux density of the Crab Nebula in respect to Orion Nebula was measured at the frequency of 927 MHz with the same 10-m radio telescope.
E. N. Vinyajkin
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