An unusual planetary system with three known ultra-low density 'super-puff' planets has at least one more planet, according to new observations.

Jupiter reaches opposition; meanwhile, the star Canopus shines bright and the constellation Pictor offers many gems to view.

The Voyager 1 spacecraft is functioning normally again after the aging probe’s dwindling power supply triggered a communications blackout. It’s one of several challenges faced by the spacecraft this ...

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