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Artist concept of the planetary body 2014 UZ224, more informally known as DeeDee. ALMA was able to observe the faint millimeter-wavelength "glow" emitted by the object, confirming it is roughly 635 kilometers across. At this size, DeeDee should have enough mass to be spherical, the criterion necessary for astronomers to consider it a dwarf planet, though it has yet to receive that official designation. | Alexandra Angelich (NRAO/AUI/NSF)
Planets

Distant Dwarf Planet DeeDee Stirs Up the Pluto Planethood Debate

Recent observations that a tiny object in our solar system is a likely dwarf planet has some planetary scientists grumbling again about Pluto's demotion to that status.

April 25, 2017
9:30 AM EDT
Size comparisons of objects in our solar system, including the recently discovered planetary body "DeeDee." | Alexandra Angelich (NRAO/AUI/NSF)
Orbits of objects in our solar system, showing the current location of the planetary body "DeeDee." | Alexandra Angelich (NRAO/AUI/NSF)