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In astronomy, the term compact object (or compact star) refers collectively to white dwarfs, neutron stars, and black holes. It could also include exotic...

Ernst Florens Friedrich Chladni (UK: /ˈklædni/, US: /ˈklɑːdni/, German: [ɛʁnst ˈfloːʁɛns ˈfʁiːdʁɪç ˈkladniː]; 30 November 1756 – 3 April 1827) was a German...

In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates...

In science, an empirical relationship or phenomenological relationship is a relationship or correlation that is supported by experiment or observation...