| 词汇 | nebulae |
| 释义 | nebulae plural ofnebulaspecialized Examples of nebulaenebulae Collisions between asteroids containing such solutions during aqueous alteration can disperse microorganisms in solar nebulae and transport them to planets and to other solar systems. These include the 21 and 30 mm emission features, and the extended red emission observed in protoplanetary nebulae and planetary nebulae. Star-forming regions within the nebulae encountered may thus be seeded by significant numbers of microorganisms. Much of the interstellar gas as well as gaseous nebulae are plasmas. Thus, these petroleum fractions can be used as model for the matter present in the interstellar medium or in the protoplanetary nebulae. In this introduction, we have started from the observation that petroleum fractions may exist in certain protoplanetary nebulae. Sections six to eleven lead us on a hop around some constellations, to illustrate a handful of stars and nebulae. Nucleosynthesis in stars determines the elemental and isotopic composition of protostellar nebulae, which probably develop with systematic relationships between nominally reducing and oxidizing components and between stable and radioactive nuclides. Since photographing stars or nebulae requires a long exposition time, it is therefore most susceptible to being affected by the wind and should be reserved for calm nights. We have also addressed our discussion to the possible formation of petroleum fractions or petroleum-like organic matter, which could exist both in the interstellar medium and in the protoplanetary nebulae. The results suggest that protoplanetary nebulae and asteroids\\meteorites may be conducive to the origins of life, to early evolution, and to seeding the galaxy by natural or directed panspermia. Amino acids are basic constituents of life, and recent laboratory experiments demonstrate they can be synthesized in the gaseous nebulae that are the birthplaces of stars. For observing smaller star clusters, nebulae, and galaxies binocular magnification is an important factor for visibility because these objects appear tiny at typical binocular magnifications. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The astronomical catalogue is composed mainly of star clusters, nebulae, and galaxies. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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