from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Alternative form of preplanetary.
Sorry, no etymologies found.
I shake his han, but then Major Fritch start tryin to tell him who we is, sayin we is, "Participants in the NASA multi-orbital pre-planetary sub-gravitational inter-spheroid space-flight trainin mission."
By examining the light signature of the material, researchers can determine which chemicals are present in a particular cloud or pre-planetary disk.
"Organic molecules such as hydrocarbons and alcohols are more common in pre-planetary disks compared with molecular clouds," Whittet said.
Whittet explained that molecular clouds around stars mature into pre-planetary disks and then planets.
The researchers look for clues within young solar systems, where stars are surrounded by molecular clouds or pre-planetary disks that have not yet coalesced into planets.
The spiral of dust, designated IRAS 23166+1655, is known as a pre-planetary nebula.
They were looking for long-lived pre-planetary nebulae, puffed-up aging stars on the verge of shedding most of their outer layers to become glowing planetary nebulae.