Answer :

GinnyAnswer

Final answer:

Luminosity defines the energy output of a star, with the Sun's luminosity serving as a benchmark for comparison.


Explanation:

Luminosity describes the total energy emitted per second by a star, encompassing all wavelengths. The Sun's luminosity serves as a reference point for comparing other stars' luminosities. For instance, Sirius has a luminosity 25 times that of the Sun, denoted as 25 Lsun.


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aniyah27lynch

Answer:

Luminosity describes the total amount of energy emitted by a star, including all wavelengths of light. For the Sun and other stars, luminosity is a measure of their brightness or the amount of light they emit. Stars with higher luminosity appear brighter in the sky, while those with lower luminosity appear dimmer. Luminosity is an important characteristic of stars, as it provides insight into their size, temperature, and stage of evolution. Stars with greater luminosity typically have larger radii and higher surface temperatures, while those with lower luminosity are smaller and cooler. Studying the luminosity of stars helps astronomers understand their properties and behavior, and it plays a crucial role in determining the life cycle and dynamics of stellar systems.

Explanation: