Why Is Space Dark If the Universe Is Full of Stars?

A person observing distant galaxies and stars in the dark universe above Earth's horizon

Why Is Space Dark If the Universe Is Full of Stars?

November 2, 2026

If the universe contains an enormous number of stars, why is the night sky mostly dark? The answer reveals important clues about the universe’s age, expansion and history

Stars twinkling above a mountain landscape beneath the Milky Way, illustrating atmospheric scintillation

Why Do Stars Twinkle but Planets Don’t? The Science Behind the Night Sky

November 1, 2026

Stars seem to flicker in the night sky, while planets often glow steadily. The difference reveals how Earth’s atmosphere affects the light reaching our eyes.