01
No hard edges
Wavelength changes smoothly — "infrared" fades into "visible" fades into "ultraviolet" with no sharp line, these are just useful labels.
Astronomy · Question
Is visible light all there is to see in space?
Your eyes detect only a tiny sliver of the electromagnetic spectrum. Most of what space telescopes actually observe — radio waves, infrared, X-rays — is completely invisible to us. Drag across the bar to explore each band.
Visual model
Drag across the spectrum.
RadioMicrowaveInfraredVisibleUltravioletX-rayGamma ray
What's simplified
The spectrum is continuous, not seven boxes.
02
Most bands need space telescopes
Earth's atmosphere blocks most X-rays, gamma rays, and much infrared — a major reason telescopes like Hubble, Chandra, and JWST are in space.
Misconception check
Quick check.
Quick check
Go deeper
Keep exploring.
Next in this series →
Light-year ↗
Measuring cosmic distance by lookback time.
Learn
Why are NASA images false color?
The direct consequence of most astronomy happening outside visible light.
Black holes
What is a black hole?
Something we can only "see" through indirect wavelengths.