Planetesimals in a sentence

Contrary to the conventional narrative of planetesimals gradually amalgamating to form planets, the research unveils a new dimension.

Studying Arrokoth can shed light on how the building blocks of planets, called planetesimals, formed in our solar system.

As a result, it escaped from the planetesimals under the warmth of the newly ignited Sun in the early Solar System.

However, the presence of iron meteorites and achondritic meteorite classes without identified parent bodies indicates that there once were other differentiated planetesimals with igneous histories, which have since been shattered by impacts.

If the Kuiper belt had always had its current low density these large objects simply could not have formed by the collision and mergers of smaller planetesimals.

In this scenario, gravitational perturbations by planetesimals caused Theia to depart from its stable Lagrangian location, and subsequent interactions with proto-Earth led to a collision between the two bodies.

Local concentrations of mass known as planetesimals form, and these accelerate the accretion process by drawing in additional material by their gravitational attraction.

Most iron meteorites are thought to come from the cores of planetesimals that were once molten.

Some scholars theorise that the galactic tide may have contributed to the formation of the Oort cloud by increasing the perihelia (smallest distances to the Sun) of planetesimals with large aphelia (largest distances to the Sun).

The energetic impacts of the smaller planetesimals (as well as radioactive decay ) will heat up the growing planet, causing it to at least partially melt.

The planetesimals that had approximately the same orbits as Jupiter were caught by the increased gravity of the planet.

The vast majority, however, are much smaller and are irregularly shaped; they are thought to be either surviving planetesimals or fragments of larger bodies.