Sentences with phrase «from planetesimal»

That's why a number of ideas have been proposed recently for speeding up core formation, by efficient accretion of either cm - or mm - sized «pebbles» early on, or small fragments and debris resulting from planetesimal collisions at later stages.

Worlds in our universe come in all shapes, from planetesimals to dwarf planets to giants with rings, but we don't fully understand how they change throughout their lifetimes, says Simon Lock at Harvard University.

Jack J. Lissauer and Glen R. Stewart, «Growth of Planets from Planetesimals,» Protostars and Planets III, editors Eugene H. Levy and Jonathan I. Luine (London: The University of Arizona Press, 1993), pp. 1080 — 1081.

Not exact matches

Moulton, an astronomer from the University of Chicago known for the planetesimal theory of planet formation, served as AAAS Permanent Secretary and then Administrative Secretary, 1937 to 1948.

Earth formed from a series of smaller planetesimals that crashed together over the course of 30 million to 40 million years.

Planets and planetesimals (small planets and large asteroids) are formed primarily from silicate rocks and metal.

Henny Lamers of the University of Utrecht in the Netherlands, says that the variations in brightness could also have been caused by a dense cloud of planetesimals, the small building blocks from which fully fledged planets are thought to accumulate.

The Kuiper Belt hosts a swarm of distant, icy objects ranging in size from small, primordial planetesimals to much larger, highly evolved objects, representing a whole new class of previously unexplored cryogenic worlds.

On January 15, 2010, a team of astronomers released the results of computer simulations indicating that kilometer - size planetesimals can form and accrete into rocky Earth - size planets around Alpha Centauri B despite gravitational perturbations from Alpha Centauri A.

Comets represent the icy planetesimals that are left over building blocks from the collapse of the solar nebula (Figure 11.2).

The mean density of distant planetesimals is expected to be markedly different from that of native main - belt asteroids.

Debris disks contain the solid remnants of planet formation that are in collisional cascade, with particles ranging from kilometre - sized planetesimals down to micron - sized dust grains.

A planet in an inclined orbit gravitationally attracts small bodies of rock and / or ice, called planetesimals, from the main disk, and moves them into an orbit aligned with that of the planet.

«Many of these systems may have formed similarly to Kepler - 223, but then later became destabilized, perhaps by a more distant massive planet or perhaps by the cumulative effect of the scattering of many smaller planetesimals left over from the planet - building process.»

In addition to rocky asteroids and icier bodies further out from the Sun, many agglomerated into larger planetesimals that eventually collided to form planets like the Earth, and more than 250 minerals, including olivine and zircon, developed within the planetesimals with the help of melting, collisional shocks, and reactions with water.

It is likely that any protoplanetary bodies that may have formed around S2 are still agglomerating other planetesimals, or have been lost to interstellar space or the black hole from gravitational perturbations.

On top of that, the assets developed for planetary creation (including the creation of the planets themselves) are «using the proper scientific processes, from first principles, in terms of how the solar system was formed... You get rocks forming first, when planetesimals stick together, then liquid forming on the surface.»