Neptune's mysterious moon Nereid may be an original, study shows

Neptune’s far-flung moon Nereid may be the last of the planet’s original companions that managed to survive a cosmic crash, scientists reported Wednesday. Neptune’s biggest moon, Triton, barged in ...
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Space debris is forcing satellites to dodge more often — costing us vital science. 'Things will get worse before they get better'

"Each time a satellite has to maneuver to avoid a potential collision, it uses fuel which is a finite and precious resource." ...

NASA’s Psyche spacecraft returns unfamiliar views of a familiar world

Not quite halfway through a six-year sojourn through the Solar System, a NASA spacecraft used a close encounter with Mars ...