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Image of the asteroid Dimorphos, with compass arrows, scale bar, and color key for reference. The north and east compass...

Against a black background, the image of the asteroid Dimorphos, with compass arrows, scale bar, and color key for reference. The bright white object at lower left is Dimorphos. It has a blue dust tail extending diagonally to the upper right. A cluster of blue dots (marked by white circles) surrounds the asteroid. These are boulders that were knocked off the asteroid when, on September 26, 2022, NASA deliberately slammed the half-ton DART impactor spacecraft into the asteroid as a test of what it would take to deflect some future asteroid from hitting Earth. Hubble photographed the slow-moving boulders with the Wide Field Camera 3 in December 2022. The color results from assigning a blue hue to the monochromatic (grayscale) image.

An emperor penguin waddles away on Christmas morning in Antarctica. On Christmas day, the BARREL team visited a penguin colony....