Sentences with phrase «dust accrete»

Not exact matches

This abundance is lower than model estimates of ultraviolet (UV) degradation of accreted interplanetary dust particles (IDP's) or carbonaceous chondrite material.

Walter's recent research has focused on the period early in Earth's history, shortly after the planet accreted from the cloud of gas and dust surrounding our young Sun, when the mantle and the core first separated into distinct layers.

He was among the first to show that young stars with ages of only 1 million years accrete material from surrounding disks of gas and dust.

I apply numerical models to investigate the physical and chemical evolution of planetary materials, ranging from the small dust grains suspended in protoplanetary disks to the many kilometer - scale objects which accrete together to form planets.

Whereas ice giant planets, such as Uranus and Neptune, which are denser and composed of ices, dust, and other heavier debris, likely formed farther out in the system, as an amalgam of leftover heavier substances rich in heavier elements that accreted beyond the snow line.

In the first scenario, the Milky Way would have formed when star clusters merged to form the galaxy's bulge, or core, which then accreted more gas and dust to form its flattened disk of spiral arms.

Kuiper Belt Objects appear to be primitive bodies that are remnants of the early stages of solar system formation, when the giant planets (Jupiter, Saturn, Uranus, and Neptune) were accreting surrounding gas, dust, and ices.

SDSS studies have probed the dark matter environments of quasars through clustering measurements, revealed populations of quasars whose central engines are hidden by obscuring dust, captured changes in quasar spectra that show clouds moving in the gravitational grip of the central black hole, and allowed a comprehensive census of the much fainter accreting black holes (active galactic nuclei, or AGN) in present - day galaxies.