Since the dawn of the Space Age in the 1950s and the discovery of exoplanets in the 1990s, the model has been both challenged and refined to account for new observations. The Solar System has …

About 4.6 billion years ago, this gigantic cloud was transformed into our Sun. The processes that followed gave rise to the solar system, complete with eight planets, 181 moons, and countless …

Nov 27, 2025 · Solar system - Origin, Planets, Formation: As the amount of data on the planets, moons, comets, and asteroids has grown, so too have the problems faced by astronomers in forming …

How did our solar system come to be, and when did key events that led to life on Earth occur?

The central condensation eventually formed the Sun, while small condensations in the disk formed the planets and their satellites. The energy from the young Sun blew away the remaining gas and dust, …

Apr 23, 2024 · Understanding the origin and long-term evolution of the Solar System is a fundamental goal of planetary science and astrophysics.

2 days ago · The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 million asteroids, and about 3,900 comets.

A new theory for the origin of the Solar System explains the meteorite record by forming planets in two steps.

The formation and evolution of our solar system (and planetary systems around other stars) are among the most challenging and intriguing fields of modern science.

A viable theory of solar system formation must take into account motion constraints, chemical constraints, and age constraints. Meteorites, comets, and asteroids are survivors of the solar nebula …