Richard Leis

Sedna in the Sky with Diamonds

Artist's conception of Sedna, a planet-like object so far away that the Sun appears as an extremely bright star instead of the large, warm disc observed from Earth.
Image Caption: “Artist’s conception of Sedna, a planet-like object so far away that the Sun appears as an extremely bright star instead of the large, warm disc observed from Earth.” Image Credit: NASA/JPL-Caltech/R. Hurt (SSC)

Tenth planet? Oort cloud member? Planet-like? Just call it Sedna, the newly discovered furthest object in our solar system, second only to Mars in redness and estimated to be about three-fourths the size of Pluto.

Richard Leis

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