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The Solar System is one of many planetary systems in the galaxy. [1] [2] The planetary system that contains Earth is named the "Solar" System. The word "solar" is derived from the Latin word for Sun, Sol (genitive Solis). Anything related to the Sun is called "solar": for example, stellar wind from the Sun is called solar wind.
The principal component of the Solar System is the Sun, a G-type main-sequence star that contains 99.86% of the system's known mass and dominates it gravitationally. [37] The Sun's four largest orbiting bodies, the giant planets, account for 99% of the remaining mass, with Jupiter and Saturn together comprising more than 90%.
Here's the chronology of the Solar system and the Universe: In 13.8 Billion years ago, The Universe is hot and dense due to a tiny dense point known as the Singularity, In 4.6 Billion years ago, A nebula collapsed, forming our Sun, In 4.5 Billion years ago, Planets, Earth, and the Moon has been formed, In 3.8 Billion years ago, the Oort Cloud ...
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...
Historical models of the Solar System; History of astronomy; Timeline of cosmological theories; The number of currently known, or observed, objects of the Solar System are in the hundreds of thousands. Many of them are listed in the following articles: List of Solar System objects; List of gravitationally rounded objects of the Solar System
This model posits that, 4.6 billion years ago, the Solar System was formed by the gravitational collapse of a giant molecular cloud spanning several light-years. Many stars, including the Sun, were formed within this collapsing cloud. The gas that formed the Solar System was slightly more massive than the Sun itself.
By RYAN GORMAN Scientists may have found Planet X -- the long-rumored object believed to be larger than Earth and further from the sun than Pluto. Planet X and another object dubbed "Planet Y ...
First spacecraft beyond the Inner Solar System. USA (NASA) Pioneer 10 [33] January 1974 First spacecraft to return data on a long-period comet. USA (NASA) Mariner 10 [34] 5 February 1974: First mission to explore two planets in a single mission (Mercury and Venus). First photograph of Venus from space. First use of solar wind for spacecraft ...