*a ‘star-forming region’ in the ‘large magellanic cloud’*
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*as of ‘16 SEPTEMBER 2023’*
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*a star is a luminous sphere of ‘plasma’ held together by its own ‘gravity’*
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(the nearest ‘star’ to ‘earth’ is the ‘sun’)
(many other ‘stars’ are visible to the ‘naked eye’ from ‘earth’ during the night, appearing as a multitude of ‘fixed luminous points’ in the sky due to their immense distance from ‘earth’)
(historically, the most prominent stars were grouped into ‘constellations’ and ‘asterisms’, the brightest of which gained ‘proper names’)
(‘astronomers’ have assembled ‘star catalogues’ that identify the ‘known stars’ and provide ‘standardized stellar designations’)
(however, most of the stars in the ‘universe’ (including all stars outside our ‘milky way’ galaxy) are invisible to the ‘naked eye’ from ‘earth’)
(indeed, most are invisible from ‘earth’ even through the most powerful ‘telescopes’)
(for at least a portion of its ‘life’, a ‘star’ shines due to ‘thermonuclear fusion’ of ‘hydrogen’ into ‘helium’ in its core, releasing ‘energy’ that traverses the star’s interior and then radiates into ‘outer space’)
(almost all ‘naturally occurring elements’ heavier than ‘helium’ are created by ‘stellar nucleo-synthesis’ during the star’s lifetime, and for some stars, by ‘supernova nucleo-synthesis’ when it ‘explodes’)
(near the end of its ‘life’, a star can also contain ‘degenerate matter’)
(astronomers can determine the ‘mass’, ‘age’, ‘metallicity’ (aka ‘chemical composition’), and many other properties of a ‘star’ by observing its ‘motion’ through ‘space’, its ‘luminosity’, and ‘spectrum’ respectively)
(the ‘total mass’ of a ‘star’ is the main factor that determines its ‘evolution’ and ‘eventual fate’)
(other characteristics of a ‘star’ (including ‘diameter’ + ‘temperature’) change over its ‘life’, while the star’s environment affects its ‘rotation’ + ‘movement’)
(a plot of the ‘temperature’ of many ‘stars’ against their ‘luminosities’, produces a plot known as a ‘hertzsprung–russell diagram’ (or ‘H–R diagram’))
(the plotting of a particular star on that ‘diagram’ allows the ‘age’ + ‘evolutionary state’ of that ‘star’ to be determined)
(a star’s ‘life’ begins with the ‘gravitational collapse’ of a ‘gaseous nebula’ of material composed primarily of ‘hydrogen’, along with ‘helium’ and trace amounts of ‘heavier elements’)
(when the ‘stellar core’ is sufficiently ‘dense’, ‘hydrogen’ becomes steadily converted into ‘helium’ through ‘nuclear fusion’, releasing ‘energy’ in the process)
(the remainder of the star’s ‘interior’ carries ‘energy’ away from the core through a combination of ‘radiative’ + ‘convective’ heat transfer processes)
(the star’s ‘internal pressure’ prevents it from collapsing further under its own ‘gravity’)
(when the ‘hydrogen fuel’ at the ‘core’ is exhausted, a star of mass 0.4 times greater than the sun’s will expand to become a ‘red giant’)
(in some cases, it will fuse ‘heavier elements’ at the ‘core’ or in ‘shells’ around the ‘core’)
(as the star expands, it throws a part of its ‘mass’ (enriched with those ‘heavier elements’) into the ‘interstellar environment’, to be recycled later as ‘new stars’)
(meanwhile, the ‘core’ becomes a ‘stellar remnant’: a ‘white dwarf’, a ‘neutron star’, or (if it is sufficiently massive), a BLACK HOLE)
(binary and multi-star systems consist of two or more stars that are gravitationally bound, and generally move around each other in stable orbits)
(when two such stars have a relatively close orbit, their gravitational interaction can have a significant impact on their evolution)
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(stars can form part of a much larger gravitationally bound structure, such as a ‘star cluster’ or a ‘galaxy’)
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“THE SUN”
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“pole star”
visible star that is approximately aligned with the earth’s axis of rotation
(lies approximately directly overhead when viewed from the earth’s north or south pole)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥