newsweek.ro/stiinta/de-ce-palpaie-stelele-pe-cer-m

Stars appear to twinkle due to atmospheric interference, not because they actually pulsate in space. As light travels through Earth's atmosphere, it encounters layers of air with varying temperatures and densities, causing the light to bend and shift. This phenomenon, known as scintillation, makes stars seem to change brightness. Stars near the horizon twinkle more than those overhead because their light passes through a thicker slice of atmosphere, encountering more turbulence. In contrast, planets appear stable due to their larger size, which allows multiple light rays to average out disturbances. Telescopes on Earth use adaptive optics to counteract atmospheric distortions, while space telescopes like Hubble avoid these issues entirely.