![](https://www.nasa.gov/sites/default/files/thumbnails/image/seasons_msg_20101221_lrg.jpeg)
The Earth's solstices come twice a year. For the Northern Hemisphere, this year's winter solstice happens on Dec. 21. via NASA https://ift.tt/33O7Lnn
The blue tentacle-like arms containing gecko-like adhesive pads, attached to an Astrobee robotic free-flyer, reach out and grapple a "...
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