Answer · 3I/ATLAS
A thin-disc body a few billion years old
3I/ATLAS came from the Galaxy's thin disc and is a few billion years old, not necessarily older than the Sun.
Where it stands
Still possibleTwo pieces of evidence for, none against. It needs two reviews to be accepted.
What it predicts
- Kinematic ages with realistic disc heating fall below about 8 billion years
- Its isotopes have another explanation than great age
What would rule it out
- Thick-disc membership established from orbit integration with Gaia DR4
Evidence 2 for · none against
Kinematic age of 3 to 11 billion years
FORSuggestive
The questions it answers
Open2 answers, none ahead
Cite it
Mysteries Department. (2026). A thin-disc body a few billion years old [Answer ANS0DFQ335PRDVB]. https://mysteriesdept.com/r/ANS0DFQ335PRDVB
@misc{mysteriesdept_ans0dfq335prdvb,
title = {A thin-disc body a few billion years old},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0DFQ335PRDVB},
url = {https://mysteriesdept.com/r/ANS0DFQ335PRDVB}
}