Sharmila Kuthunur is a Seattle-based science journalist covering astronomy, astrophysics and space exploration. Follow her on X @skuthunur.
spacecraft radioed to Earth images of the farthest object ever explored: a snowman-shaped primordial object named Arrokoth, one of many frigid residents in thethat sits beyond Neptune's orbit. The pictures revealed the surface of the two-lobed, 21-mile-wide structure to be rusty red, and this mysterious hue has kept scientists puzzled ever since.'s surface, somehow converts primitive ices like methanol into organic molecules that give off an ultra-red hue.
The simulated radiation set off a series of chemical reactions in the ice, which led to the formation of a group of carbon-rich molecules known as polycyclic aromatic hydrocarbons, or PAHs, known to be common in the universe. But interestingly, spectroscopic techniques revealed the radiation-infused ices also produced, the main sugar in your blood and your body's primary source of energy.
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