Planetary systems similar to or like Solar System
Gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Wikipedia
The formation and evolution of the Solar System began about 4.57 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. 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. Wikipedia
Astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and – according to the International Astronomical Union but not all planetary scientists – has cleared its neighbouring region of planetesimals. Ancient, with ties to history, astrology, science, mythology, and religion. Wikipedia
The geology of solar terrestrial planets mainly deals with the geological aspects of the four terrestrial planets of the Solar System – Mercury, Venus, Earth, and Mars – and one terrestrial dwarf planet: Ceres. Only terrestrial planet known to have an active hydrosphere. Wikipedia
List of possibly gravitationally rounded objects of the Solar System, which are objects that have a rounded, ellipsoidal shape due to their own gravity . Their sizes range from planetary-mass objects like dwarf planets and some moons to the planets and the Sun. Wikipedia
Sentences forSolar System
- More recently, the name is sometimes simply given as Earth, by analogy with the names of the other planets, though earth and forms with the remain common.
- Carl Sagan wrote: "Many scientists deeply involved in the exploration of the solar system (myself among them) were first turned in that direction by science fiction."
- Today, the Orangerie contains the Museum of Astronomy and Technology, with a scale model of the Solar System spanning the entire park and beyond.
- The astronomical unit is used primarily for measuring distances within the Solar System or around other stars.
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