Wikipedia:Main Page history/2023 October 29b

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Major bodies of the Solar System
Major bodies of the Solar System

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. There are eight planets, numerous dwarf planets, the asteroid belt between Mars and Jupiter, the Kuiper belt, and the scattered disc beyond Neptune's orbit. The Solar System was formed 4.6 billion years ago from the gravitational collapse of an interstellar molecular cloud, which formed the Sun and a protoplanetary disk that coalesced into other objects. Many celestial bodies have natural satellites orbiting them, and all giant planets and a few smaller bodies are encircled by planetary rings. Many small-body populations, including comets, centaurs, and interplanetary dust clouds, freely travel between the Solar System's regions. The solar wind, a stream of charged particles flowing outwards from the Sun, creates a heliosphere region. The Oort cloud may extend roughly a thousand times farther than the heliosphere. (This article is part of a featured topic: Solar System.)

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Ion Biberi
Ion Biberi

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Kalle Rovanperä in June 2022
Kalle Rovanperä

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October 29: Republic Day in Turkey (1923)

Marmaray train
Marmaray train
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Louis Blanc

Louis Blanc (29 October 1811 – 6 December 1882) was a French politician and historian. He advocated for socialist reforms without revolution first, and called for the creation of job guarantees for the urban poor. Blanc coined the phrase "right to work", and his political and social ideas greatly contributed to the development of socialism in France. This photograph of Blanc was taken in 1848 by the French photographer Étienne Carjat.

Photograph credit: Étienne Carjat; restored by JLPC

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