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1 giorno fa · Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.
1 giorno fa · The Sun is the star at the center of the Solar System. It is a massive, nearly perfect ball of hot plasma, [18] [19] heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
1 giorno fa · Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Since the late 19th century, astronomy has expanded to include astrophysics, the application of physical and chemical knowledge to an understanding of the nature of celestial objects.
1 giorno fa · Space exploration is the use of astronomy and space technology to explore outer space. While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight.
4 giorni fa · Marte è il quarto pianeta del sistema solare in ordine di distanza dal Sole; [4] è visibile a occhio nudo ed è l'ultimo dei pianeti di tipo terrestre dopo Mercurio, Venere e la Terra (1,52 UA di distanza dal sole). Chiamato pianeta rosso per via del suo colore caratteristico causato dalla grande quantità di ossido di ferro che lo ricopre ...
2 giorni fa · Solar system, assemblage consisting of the Sun and those bodies orbiting it: 8 planets with about 210 known planetary satellites; many asteroids, some with their own satellites; comets and other icy bodies; and vast reaches of highly tenuous gas and dust known as the interplanetary medium.
2 giorni fa · What is a galaxy? Are all galaxies the same shape? What are the types of galaxies? What is an example of a Sa galaxy?
