Results 71 to 80 of about 249 (93)

Generalized energy balance method for the determination of central star parameters and optical thickness of a planetary nebula

Astrophysics and Space Science, 1995
A method is proposed allowing a quick self-consistent determination of both the central star parameters (effective temperature, surface gravity, stellar massetc.) and the optical thickness of a planetary nebula (PN). The method is a generalization of the well-known energy balance method. The method has been calibrated and tested using a photoionization
Yu. F. Malkov, V. V. Golovatyj, O. V. Rokach   +2 more
openaire   +1 more source

A Dynamic Model for the Planetary Bearings in a Double Planetary Gear Set

Mechanical Systems and Signal Processing, 2023
Min Xia, Jing Liu, Xinbin Li
exaly  

The Planetary Hypothesis Revived

Nature, 2013
Paul Charbonneau
exaly  

Calcium Signals in Planetary Embryos

Nature, 2018
Alessandro Morbidelli
exaly  

Proto-Planetary Nebulae

Annual Review of Astronomy and Astrophysics, 1993
Sun Kwok
exaly  

The Boundaries of the Planetary Boundary Framework: A Critical Appraisal of Approaches to Define a “Safe Operating Space” for Humanity

Annual Review of Environment and Resources, 2020
Frank Biermann, Rakhyun E Kim
exaly  

Planetary Science: Lunar Conspiracies

Nature, 2013
Robin M. Canup
exaly  

Condition Monitoring and Fault Diagnosis of Planetary Gearboxes: A Review

Measurement: Journal of the International Measurement Confederation, 2014
Yaguo Lei, Jing Lin, Ming J. Zuo
exaly