A newly released study of unusual asteroid orbits strengthens the case for the hypothesized distant, massive Planet Nine.
This pair of objects were the subject of a controversy that threatened to undermine our basic understanding of cosmic ...
PRIMA — the Probe far-infrared Mission for Astrophysics — is in the proposal stage, with hopes to be launched by the end of ...
If the JWST can see galaxies billions of light-years away, why can’t it find the proposed Planet X in our solar system?
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