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The ninth photoreceptor cell in each ommatidium is sensitive to polarized UV light. The signals from this cell are processed separately to those of normal vision. Polarised UV light is used for navigation when the sun is obscured.
Sun's protective 'bubble' is shrinking
The heliosphere is created by the solar wind, a combination of electrically charged particles and magnetic fields that emanate a more than a million miles an hour from the sun, meet the intergalactic gas that fills the gaps in space between solar systems.
At the boundary where they meet a shock wave is formed that deflects interstellar radiation around the solar system as it travels through the galaxy.