James Webb Space Telescope solves a comet crystal mystery

A'cosmic highway' may explain the journeys of some space silicates. Breakthroughs, discoveries, and DIY tips sent six days a week. Some of the solar system's most distant comets can be very confusing. Many contain crystalline silicates that only form after exposure to high heat, which doesn't make a lot of sense to astronomers. These comets spend most of their time inside the extremely cold Oort cloud and Kuiper Belt, at temperatures averaging -450 degrees Fahrenheit.