Polarimetry: Studying Cosmic Light Waves

Polarimetry measures the orientation of light waves, not just their brightness or color.
Light becomes polarized when it scatters off dust, gas, or magnetic fields in space.
Astronomers use it to study the shape and composition of interstellar dust clouds.
Polarimetry reveals magnetic fields in galaxies, nebulae, and even around black holes.
It helps detect exoplanets by spotting polarized light reflected from their atmospheres.
The technique distinguishes between starlight and light from faint surrounding material.
Polarized light from supernova remnants tells us about their shockwaves and structure.
Instruments like polarimeters can be added to telescopes for this specialized work.
Polarimetry is also used to study icy bodies in the solar system, like comets.
By analyzing polarized light, astronomers unlock hidden details about the universe’s invisible forces.