Sources: Adso Chinese-English Dictionary; 英汉公共大词典; 英汉地质大词典; CC-CEDICT; Law Dictionary; 英汉冶金大词典
In a one- star system like our solar system, the leading theory as to how the planets formed is through a process called accretion.
The scientists found the observed X -ray emission was a factor of 30 to 50 times smaller than expected from the accretion scenario, effectively ruling it out.
They zapped a tiny plastic pellet with 12 laser beams fired simultaneously and allowed some of the resulting radiation to blast a pellet of silicon, a common element in accretion disks.
The most successful men in the end are those whose success is the result of steady accretion.
For decades, astronomers have been confident that relatively low - mass stars such as our sun form by the gradual accretion, or buildup, of mass from a disk of gas and dust.
Matter funnels into the supermassive black hole from a ring of material circling around it and called an accretion disk.
The TSU -headed group have challenged the planetary accretion theory as the sole planet-forming mechanism in favor of a faster "gravitational collapse" model.
We'd be able to connect a lot of the physics happening within the gaseous environment and accretion disk to the binary black hole merger to the gravitational radiation.
They go around in the plane of the blackboard, say, and so this matter cannot fall radially in but it will fall in and spiral in and forms what we call an accretion disk around the neutron star.
More - recent work indicated massive stars could form by accretion after all, but researchers had not actually observed it.