StillnessNight environment fact1,385 of 1,961

Light pollution is not just a lost view of the stars; it changes the night-time signals that people, plants and animals use to rest, move and survive.

NASA / DarkSky International

Why it matters

The idea in context

Useful light makes streets safer and work possible after dark. Waste light is different: it spills upward, sideways or all night, flattening the boundary between day and night. For migrating birds, insects, plants and human sleep, darkness is not absence. It is information.

Türkçe

Aynı kart, başka bir dilde.

Işık kirliliği gecenin yalnız yıldızlarını değil, canlıların dinlenmek, yön bulmak ve zamanını ayarlamak için kullandığı karanlık işaretleri de silikleştirir.

Gerekli ışık hayatı kolaylaştırır; sorun, ihtiyaç bitince de yukarıya, yana ve bütün geceye taşan ışıktır. Böyle bir parlaklık gökyüzünü soldurur, böcekleri ve göçmen kuşları şaşırtır, bitkilerin ve insanların gece-gündüz ritmini bozar. Karanlık boşluk değildir; pek çok canlı için yön, dinlenme ve zaman bilgisidir.

Source trail

Read beyond the card.

NASA Black Marble maps artificial nighttime lights from space; DarkSky International defines light pollution as human-made alteration of natural outdoor light levels and describes effects on communities, wildlife and natural rhythms. Sources: https://www.earthdata.nasa.gov/data/projects/black-marble ; https://darksky.org/resources/what-is-light-pollution/ ; https://darksky.org/resources/what-is-light-pollution/effects/wildlife-ecosystems/ ; audited 2026-07-07.

Background reading: Light pollutionAttribution and context are revised when stronger evidence appears. Corrections are welcome through the editorial page.

Open in the iPhone app Editorial method

Next in the open archiveDendrochronology reads annual tree rings to date wood and reconstruct past climate, fires, droughts and human building histories.Q1437

Light pollution is not just a lost view of the stars; it changes the night-time signals that people, plants and animals use to rest, move and survive.

The idea in context

Aynı kart, başka bir dilde.

Read beyond the card.

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