If it exists, the 9th planet has 10 times the mass of Earth – orbits 20 times farther from the sun – and takes 20,000 years to orbit the sun once.
from EarthSky » Space http://ift.tt/1PhxKoV
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If it exists, the 9th planet has 10 times the mass of Earth – orbits 20 times farther from the sun – and takes 20,000 years to orbit the sun once.
from EarthSky » Space http://ift.tt/1PhxKoV
via IFTTT
Telescopically 