Ask Ethan: What are the worst cosmic names? | By Ethan Siegel | Start with an explosion! | February 2025

The egg nebula, as it has been photographed here by Hubble, is a preplanetary nebula, since its external layers have not yet heated at sufficient temperatures by the central and contracting star to completely ionize. Many of the giant stars visible today will evolve towards a nebula such as it is before throwing their external layers completely and dying in a white dwarf combination/planetary nebula. Despite its name, neither this nor the most evolved planetary nebulae have anything to do with the planets. (Credit: NASA and the Hubble Heritage team (STSCI/Aura), Hubble Space Telescope/ACS)

Historically, astronomers have often appointed things in a creative way, strange already often inaccurate. But what terms are the most atrocious?

Ethan Siegel

In the universe, there are all kinds of fascinating objects, phenomena and events that have been predicted, theorized or directly observed. Some of them are named quite intuitively, since we have no problem with names such as the stars -forming region or the stellar remnant. Others are named a little more poetically, such as Kugelblitzwhich refers to a black (theoretical) hole formed only by radiation, or Syrygywhich is the alignment of three (or more) astronomical bodies. Others are words derived from acronyms, with objects such as quasars Derived from the acronym Qsrs: sources of quasi stellar radio. While astronomers are known for inventing unnecessary acronyms (astronomer Glen Petitpas He has created a silly astronomical or too forced acronomic siteo Doofaas database), we can go further and look at the names of astronomy that are complete nomeres: named in such a way that the literal meaning of the words used to describe the object or the phenomenon inaccurately represent what it really is .

That is the investigation of Patreon’s supporter, Tim Graham, who was reading This recent article about T

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