yjeve

Yjet, in Albanian usage, refer to the luminous spheres of plasma that populate space and generate light and heat through nuclear fusion in their cores. The Sun is the closest and most familiar star, and distant stars appear as points of light in the night sky because of their great distances. Their brightness and color arise from intrinsic properties and their separation from Earth.

Stars form from dense regions of molecular clouds. Gravity pulls material inward to form a protostar, and when sufficient temperature and pressure are reached in the core, hydrogen fusion begins. A star then settles on the main sequence, where it fuses hydrogen to helium for most of its life. The ultimate fate of a star depends on its mass: low- to intermediate-mass stars end as white dwarfs after shedding outer layers; more massive stars may become neutron stars or black holes after dramatic supernova explosions.

Key properties include mass, luminosity, temperature and radius, which determine a star’s color and brightness. Stars are classified by spectral type, from hottest to coolest as O, B, A, F, G, K, and M. This sequence corresponds to colors ranging from blue to red. Stars vary greatly in size, from small red dwarfs to enormous blue giants. Many stars belong to binary or multiple systems, and some host exoplanets.

Observationally, distances to stars are measured through parallax and other methods. Stars populate galaxies and often form clusters. They are studied for their life cycles, variability, and endpoints, such as novae and supernovae, which enrich the cosmos with heavier elements.

Culturally, stars have guided navigation and timekeeping and appear in language and folklore. In Albanian usage, yjeve denotes stars collectively and appears in poetry and everyday speech when referring to the night sky.