2024年10月29日 · Jupiter and Saturn are thought to have formed first and quickly within the first 10 million years of the solar system. In the warmer parts of the disk, closer to the star, rocky …

Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.

2023年10月18日 · Analyzing their characteristics, compositions, and atmospheres can offer valuable insights into the formation and evolution of planetary systems across the cosmos.

Our solar system began as a collapsing cloud of gas and dust over 4.6 billion years ago. Over the next 600 million years, called by geologists the Hadean Era, the sun and the planets were formed, and Earth’s oceans were probably created by cometary impacts. Comets are very rich in …

2023年11月8日 · Scientists using NASA’s James Webb Space Telescope just made a breakthrough discovery in revealing how planets are made. By observing water vapor in protoplanetary disks, Webb confirmed a physical process involving the drifting of ice-coated solids from the outer regions of the disk into the rocky-planet zone.

Since different materials condense at different temperatures, our solar system formed different types of planets. The dividing line for the different planets in our solar system is called the frost line. In the simulation below, notice where hydrogen and helium condense in the solar nebula.

2021年10月9日 · This slide illustrates how planets form from dust over a few hundred million years inside protoplanetary disks. Steps illustrated in this slide include planetesimal, protoplanets, giant, and rocky planets. NOTE: This PowerPoint file has built-in interactive elements.

By combining multi-wavelength observations with cutting-edge theoretical models, we are able to start piecing together the planet formation process and understand the origins of our own Solar System.

The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk. Planets grow in this disk by the gradual accumulation of material driven by gravity, a process called accretion.

Modern studies of planet formation include comparing exoplanetary systems, identification of protoplanetary disks around newborn stars, and computer models to trace the creation of planets from their origins in interstellar dust and gas.