Astronomy.
Cosmology and observation, including the parts nobody can identify yet.
Articles
0
Quick Takes
0
Videos
0Soon
Podcasts
0Soon
Clarity Index
—Soon
Followers
—Soon
Astronomy is the discipline most comfortable saying 'we do not know', which is exactly why it is worth studying. Its two largest components are named after the fact that nobody can identify them.
What this field actually measures
- Universe composition
Share of the cosmic energy budget by type.
ReferenceRoughly 5% ordinary matter, about 27% dark matter, and about 68% dark energy.
Limit'Dark' here means unidentified, not explained.
- Hubble tension
Disagreement between methods measuring cosmic expansion.
ReferenceEarly-universe methods give roughly 67 km/s/Mpc; local distance-ladder methods give roughly 73.
LimitBoth come with small error bars, which is the problem.
- Lookback time
How far back in time a telescope observes.
ReferenceJWST observes galaxies whose light left them within a few hundred million years of the Big Bang.
Evidence & metrics
The published work behind the numbers above, and the public datasets you can open to check us. If a claim can’t be traced here, we don’t print it.
Citations
Gaia Data Release documentation
European Space Agency — Gaia Collaboration · 2016–present
Delivers parallax and proper motion for over a billion stars with per-source uncertainty published.
Observation of gravitational waves from a binary black hole merger
LIGO Scientific Collaboration & Virgo — Physical Review Letters · 2016
First direct detection, reported with a stated false-alarm rate rather than a bare claim.
Datasets
NASA / Caltech IPAC · free
Confirmed and candidate planets with discovery method and parameter errors.
MAST archive (Hubble, JWST, TESS)
Space Telescope Science Institute · free
Raw and calibrated observations from major space telescopes.
Still open
- What resolves the Hubble tension — new physics or an unmodelled systematic?
- What is dark matter made of?
- How did the earliest galaxies assemble so quickly?
What we won’t say
We will not call an unexplained signal evidence of anything. Unidentified is a category, not a conclusion.
- VO-1Evidence before wit
- VO-2Punch at claims, never at people
- VO-3Say the uncertainty out loud
Everything published on this topic.
No articles have been published for Astronomy yet. New long-form pieces will land here.
Everything published on Astronomy.
The permanent record of every piece we publish under this topic — grouped by year, oldest kept as history.
Short reactions, polls, and open questions.
Faster than the long form. Same standard.
No quick takes match this filter yet.
Evidence, counterpoints, patterns, and the standard.
Every entry links back to its source article. Nothing duplicated.
Framework entries appear here as articles publish.
Open questions and measurable predictions.
We log the question, the confidence, and the review date. When the evidence moves, so does our position.
No active predictions are currently being tracked for this topic.
Coverage on screen.
Long-form, shorts, and playlists connected back to the source articles.
Video coverage is coming soon.
Coming SoonWe haven't published video on Astronomy yet. Playlists, chapters, and shorts will surface here as they roll out.
Long-form conversations.
No podcast episodes yet.
Coming SoonWhen we publish podcast episodes on Astronomy, each will link back to its source article.
Connected hubs.
Where this topic overlaps with the rest of the 2CS knowledge graph.
Explore Astronomy
Every surface connected to this topic.
One permanent home per topic — the whole 2CS library on Astronomy, indexed for readers and search engines alike.
- All Astronomy articlesLong-form analysis and film breakdowns tagged Astronomy.
- Astronomy quick takesShort reactions, polls, and open questions on the record.
- Astronomy in the 2CS Analysis FrameworkEvidence, counterpoints, patterns, and the standard.
- Astronomy Future WatchPredictions we're tracking with confidence and review dates.
- Video coverageLong-form, shorts, and playlists — filter for Astronomy coverage.
- Podcast episodesLong-form conversations that reference Astronomy.
- Community investigationsReader-led inquiries connected to Astronomy.
- Claims & evidence lockerEvery claim we've logged, with the evidence behind it.
- Astronomy in the Knowledge GraphHow this topic connects to people, teams, and events.
Related topics
Where Astronomy overlaps.
Full index
Browse every topic.
Every permanent home in one place — grouped by league, discipline, and idea.
All topicsThe conversation, on the record.
Community discussion is coming soon.
Coming SoonA dedicated space for readers to discuss this topic will live here — moderated to the same standard as the editorial.
Follow Astronomy.
One weekly dispatch. Signal over noise. No spam.
No spam. Unsubscribe anytime.