The evolution of a 1.2M⊙ star along the asymptotic branch with continuous mass loss is presented, showing that this mass loss leads to the formation of a PN with a typical central star in its center.doi:10.1007/978-94-009-8500-1_50A. Harpaz...
【解析】题干问的是：根据第 2 段，下列关于十八世纪太阳系起源理论的说法，哪一个是正确的？根据题干the origin of the solar system定位到段首句：关于太阳系起源的一个关键证据是，所有的行星都在同一个方向和几乎同一个平面上绕太阳公转，对应A选项。
Boss, A. P. Evolution of the solar nebula. IV. Giant gaseous protoplanet formation. Astrophys. J. 503, 923–937 (1998). Article ADS Google Scholar Keppler, M. et al. Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70. Astron. Astrophys. 617,...
ISM: individual objects: Pipe NebulaISM: cloudsISM: structureultraviolet: ISMA growing body of evidence indicates that the formation of filaments in interstellar clouds is a key component of the star formation process. In this paper, we present new Herschel-PACS and SPIRE observations of the B59...
A. & Carpenter, J. M. Constraints on the stellar/substellar mass function in the inner Orion Nebula cluster. Astrophys. J. 540, 236 (2000). Article ADS Google Scholar Cunha de Miranda, B. K. et al. Threshold photoelectron spectroscopy of the methyl radical isotopomers, CH3, CH2D, CHD...
In this paper, we present a simulation for the formation of a 3-ring structure in the SN 1987A nebula obtained by HST observations. The progenitor of the SN 1987A is believed to be a red supergiant (RSG) which then evolved into a blue supergiant (BSG) just prior to the explosion. In...
An explanation of the origin of the solar system according to which a rotating nebula cooled and contracted, flattening into a disk shape with a central bulge. The matter in the disk condensed into the planets, their moons, asteroids, and comets, while the great mass at the center became th...
If this process occurs fast enough, these growing rocky cores can accrete large amounts of gas from the nebula and become giant planets (like Jupiter). In other cases, the gas in the disk can be removed before runaway accretion takes place, and the planet is left with a rocky core, ...
marking- a pattern of marks speck,pinpoint- a very small spot; "the plane was just a speck in the sky" nebula- (pathology) a faint cloudy spot on the cornea splash- a patch of bright color; "her red hat gave her outfit a splash of color" ...
Nebula. (b) This wide-angle, infrared view of the same area was taken with the Infrared Astronomical Satellite. Heated dust clouds dominate in this false-color image, and many of the stars that stood out on part (a) are now invisible. An exception is the cool, red-giant star Betelgeuse...