Neptune’s existence was proposed before it was detected, based on how its mass affected the motion of Uranus. Now, a proposed planet – smaller than Neptune but larger than Earth – has been proposed.
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Neptune’s existence was proposed before it was detected, based on how its mass affected the motion of Uranus. Now, a proposed planet – smaller than Neptune but larger than Earth – has been proposed.
from SPACE.com http://ift.tt/1PFp0mV
via IFTTT
Telescopically 