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Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. [4] [2] Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs), bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth i.e. over 250 astronomical units (AU).
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 ...
Every human language has its own word for the Earth's Moon, and these words are the ones normally used in astronomical contexts.However, a number of fanciful or mythological names for the Moon have been used in the context of astronomy (an even larger number of lunar epithets have been used in non-astronomical contexts).
From full moons to meteor showers, there have been numerous celestial events to enjoy this year—but the show isn't over yet.On Wednesday, December 4, stargazers are in for a treat as the two ...
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Why full moons in the night sky are worth viewing, how they got their names and other interesting lunar facts. Your guide to full moons for 2024: Supermoons, solstices, equinoxes and more Skip to ...
Planetary nomenclature, like terrestrial nomenclature, is a system of uniquely identifying features on the surface of a planet or natural satellite so that the features can be easily located, described, and discussed. [1]
Venus, Mars, Jupiter and Saturn will line up in the sky this week and could stay visible to the naked eye for a number of weeks. Skygazers will be treated to the sight from Wednesday all the way ...