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Astronomy (from the Greek ἀστρονομία from ἄστρον astron, "star" and -νομία -nomia from νόμος nomos, "law" or "culture") means "law of the stars" (or "culture of the stars" depending on the translation).
The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
After that, in 1955 Ensiklopedia Indonesia by Todung Sunan Gunung Mulia was published by publisher W. van Hoeve, Bandung (not to be confused by 1980's Ensiklopedi Indonesia published by Ichtiar Baru van Hoeve, Jakarta). [7] [8]
The Big Bang theory, which explains the Evolution of the Universe from a hot and dense state, is widely accepted by physicists.. In astronomy, cosmogony is the study of the origin of particular astrophysical objects or systems, and is most commonly used in reference to the origin of the universe, the Solar System, or the Earth–Moon system.
Euler diagram showing the IAU Executive Committee conception of the types of bodies in the Solar System.. The International Astronomical Union (IAU) defined in August 2006 that, in the Solar System, [1] a planet is a celestial body that:
This is a list of well-known online encyclopedias that are accessible or formerly accessible on the Internet.. The largest online encyclopedias are general reference works, though there are also many specialized ones.
True color image of the Trifid Nebula, showing complex gas and plasma structure. A nebula (Latin for 'cloud, fog'; [1] pl.: nebulae, or nebulas [2] [3] [4] [5]) is a ...
A strangelet (pronounced / ˈ s t r eɪ n dʒ. l ɪ t /) is a hypothetical particle consisting of a bound state of roughly equal numbers of up, down, and strange quarks.An equivalent description is that a strangelet is a small fragment of strange matter, small enough to be considered a particle.