heavy elements


Also found in: Dictionary, Medical.

heavy elements

In astronomy, all elements heavier than hydrogen and helium. The cosmic abundance of the heavy elements is very much lower than that of hydrogen and helium.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
Some 80 per cent of the heavy elements in the universe likely formed in collapsars, a rare but heavy element-rich form of supernova explosion from the gravitational collapse of old, massive stars typically 30 times as weighty as our sun, said physics professor Daniel Siegel.
He revealed that by focusing on quasars, unlike previous scientists who only saw shadows from hydrogen and not from heavy elements in lower-quality spectra, they were able to make this extremely rare find despite the limited time they had with the Keck Observatory's most powerful telescopes. 
Camille Carlisle replies: The globular clusters would be relatively rich in heavy elements because they've been around long enough to pollute themselves as their stars age.
Its oceans are composed of hydrogen and oxygen, the crust includes oxygen, silicon, aluminum and heavy elements, such as iron, and the mantle and core contain iron, magnesium, nickel, cobalt and oxygen.
(1) Methods for observing laminated cells by using high-intensity X-rays and incorporating heavy elements into an electrolyte (According to Toyota Motor Corporation, as of August 2016)
Scientists reached that conclusion after finding traces of heavy elements produced by the cataclysm in the ancient dwarf galaxy Reticulum II.
Analyzing complex matrix materials with a wide range of light and heavy elements, from trace to high concentration levels, is the instrument's core competency.
Nuclear processes in the interior of these stars have created heavy elements like iron, silicon, carbon and oxygen.
Agricultural Research Centre, the Central Laboratory for Insecticides Residuals & Heavy Elements in Food
The formation of small planets like Earth previously was thought to occur mostly around stars rich in heavy elements such as iron and silicon.

Full browser ?