A continous spectrum hasn't discrete gaps between lines.
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A continuous spectrum of a star is a broad range of electromagnetic radiation emitted across all wavelengths. It results from the thermal energy of the star's interior, causing atoms to vibrate and emit photons at various energies. Continuous spectra can be used to determine a star's temperature.
That's done by analyzing the star's spectrum.
You can use spectra to estimate the temperature of the star: astronomical thermometer
The two types of spectrum are continuous spectrum, which shows a continuous range of colors with no gaps, and line spectrum, which consists of distinct lines of color separated by gaps.
A hot, glowing wire emits all wavelengths (or colors) of light. This is sometimes called "blackbody radiation." Since all colors are present, you will get a continuous spectrum.
A rainbow produces a continuous spectrum of colors, known as a continuous spectrum. This spectrum is made up of all the colors of visible light, ranging from red to violet.