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Bookmark or Share- Supernova | Definition, Types, & Facts | Britannicasupernova, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level.. The term supernova is derived from nova (Latin: “new”), the name for another type of exploding star. Supernovae resemble novae in several respects. Both are characterized by a tremendous, rapid brightening lasting for a few weeks, followed by a ...
- Pentagram | Design, Shape, Star, Supernatural, Definition, & Meaning ...pentagram, a five-pointed star, usually drawn by using one continuous line of five straight segments. It has been used throughout history as a symbol, often in magic or the occult.Its meaning has varied wildly over time, and it has functioned as a symbol of protection, of perfection, of the Devil, and of humanity, among others.Mathematically, the segments of the pentagram exhibit the golden ...
- Titration | Definition, Types, & Facts | BritannicaPrecipitation titrations may be illustrated by the example of the determination of chloride content of a sample by titration with silver nitrate, which precipitates the chloride in the form of silver chloride.The presence of the first slight excess of silver ion (i.e., the end point) can be marked by the appearance of a coloured precipitate.
- Standard Definition & Meaning | Britannica DictionarySTANDARD meaning: 1 : a level of quality, achievement, etc., that is considered acceptable or desirable; 2 : ideas about morally correct and acceptable behavior
- How Do We Know How Far Away the Stars Are? | Britannica“Star light, star bright, first star I see tonight”…is trillions of miles away.
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