17/08/2025
In red — that’s me.
But what “color” is space?
In astronomy, albedo is the measure of how much light a surface reflects — from 0 (no reflection) to 1 (perfect reflection).
This simple value plays a huge role in studying planetary climates, the surfaces of celestial bodies, and even the future of Earth.
🌙 The Moon is dark — it reflects only 7% of sunlight.
Earth reflects about 39%, and snow? Up to 90%!
🌕 Venus shines like a mirror — its albedo is a stunning 75%!
Did you know albedo affects climate?
When ice melts, the surface becomes darker and absorbs more heat — accelerating warming.
This is our world, and its many reflections ☀️🌍
Albedo is a key player in Earth’s energy balance, influencing global temperature. For example:
Melting glaciers reduce albedo — dark water and soil absorb more heat, speeding up warming. That’s a classic positive feedback loop.
Forest fires and deforestation can also lower albedo, shifting local climate patterns.
Scientists are even exploring ways to artificially increase Earth’s albedo to fight global warming. Some ideas include:
▪️ Spraying aerosols into the stratosphere to reflect sunlight
Making city surfaces brighter — like white rooftops and reflective pavement
▪️ Whitening marine clouds using salt particles
These geoengineering methods are still experimental and come with big questions and risks.
