What is a planetesimal What was the role of planetesimals in the formation of planets?

According to the planetesimal hypothesis, when a planetary system is forming, there is a protoplanetary disk with materials from the nebulae from which the system came. This material is gradually pulled together by gravity to form small chunks. Some of these planetesimals go on to become planets and moons.

What is the best explanation for the location of hot Jupiters?

What’s the best explanation for the location of hot Jupiters? -They formed closer to their stars than Jupiter did. -They formed farther out like Jupiter but then migrated inward.

Why do hot Jupiters exist?

It has been proposed that gas giants orbiting red giants at distances similar to that of Jupiter could be hot Jupiters due to the intense irradiation they would receive from their stars. It is very likely that in the Solar System Jupiter will become a hot Jupiter after the transformation of the Sun into a red giant.

How does the nebular theory work?

Currently the best theory is the Nebular Theory . This states that the solar system developed out of an interstellar cloud of dust and gas, called a nebula . The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar .

Why was the Geosyncline model inadequate to explain?

Terms in this set (10) Why was the geosyncline model inadequate to explain the origins of geologic structures? The geosyncline theory could not identify the source of uplifting forces nor the forces that folded strata to form mountains. Sonar used to look for enemy submarines showed the ocean basic structures.

What causes planetesimals to stick together when they collide?

Dust and gas particles in the nebula occasionally collided and merged. Through this process, called “accretion,” these tiny particles formed larger and larger bodies, eventually becoming planetesimals up to a few kilometers across.

Is Voyager past the Oort Cloud?

Scale and Distance. The Oort Cloud is the most distant region in our solar system, and it’s jaw-droppingly far away,extending perhaps one-quarter to halfway from our Sun to the next star. At its current speed of about a million miles a day, NASA’s Voyager 1 spacecraft won’t enter the Oort Cloud for about 300 years.

How do planetesimals form planets?

Each planet began as microscopic grains of dust in the accretion disk. The atoms and molecules began to stick together, or accrete, into larger particles. By gentle collisions, some grains built up into balls and then into objects a mile in diameter, called planetesimals.