
Why can't we see dark matter?
Image: Israel Museum, Public domain, via Wikimedia Commons
Why can't we see dark matter?
Imagine you're walking through a foggy forest, but you can't see the trees or the ground. It's like there's invisible fog everywhere, making it hard to navigate.
Dark matter is like that invisible fog in space. It doesn't emit light or energy we can detect, so we can't see it directly, even though it affects the motion of galaxies and light around them.
Example
Just as you can't see through the foggy forest, astronomers can't see dark matter directly; they only see its effects on visible matter.
Remember this
Dark matter is invisible to us because it doesn't interact with light or ordinary matter in a detectable way.
Text adapted from Wikipedia, licensed under CC BY-SA 4.0.
Dark matter
Vera Rubin's galaxy rotation curves provided the strongest early evidence that most matter in the universe is invisible
Henrietta Swan Leavitt
Henrietta Leavitt discovered the period-luminosity relation of Cepheid variables
Albert Einstein
How does light behave around massive objects like stars?
Subatomic particle
Did you know light can be both a wave and a particle?
Bohr model
Did you know light behaves differently at the atomic level?
History of electromagnetic theory
Did Einstein revolutionize our understanding of gravity?
Swipe through more Discover concepts
Open Pocket Polymath