Domain authority
astronomy.com domain authority
astronomy.com has a domain authority score of 61 out of 100 (above average for a business website), based on 6,976 referring domains and a web graph rank of 9,245 among 133 million domains; its traffic rank is Top 500K websites (Chrome).
61 / 100
6,976
referring domains (backlinks from other domains)
#9,245
web graph rank of 133,241,980 domains
Top 500K
Chrome real-user traffic bucket
All metrics for astronomy.com
| Authority score | 61 / 100 |
|---|---|
| Referring domains | 6,976 |
| Web graph rank (harmonic centrality) | #9,245 (top 0.01%) |
| PageRank position | #35,386 |
| Subdomains seen in the crawl | 10 |
| Majestic Million rank | #5,135 |
| Majestic referring subnets / IPs | 5,233 / 9,626 |
| Traffic rank | Top 500K websites (Chrome) |
| Position by authority in our top 20,000 | #6,167 |
How the authority score is calculated
The score is the average of two parts, each from 0 to 100:
- Rank part:
100 × (1 − log10(rank) / log10(N))^0.6, where rank is the domain's harmonic centrality position in the Common Crawl web graph (how close it is to every other domain through links) and N is the number of ranked domains (133,241,980). - Link part:
100 × log10(1 + referring domains) / 7, so 10 million referring domains = 100.
For this domain: rank part 66.9 (web graph rank 9,245 of 133,241,980), link part 54.9 (6,976 referring domains), average 60.9, rounded to 61.
It is consistent across all 120 million domains in the data, so it is good for ranking and filtering lists. It is not Moz Domain Authority or Ahrefs Domain Rating. Referring domains count other domains that link to this one, not individual backlinks; no list of linking pages is included.
Domains with a similar authority score
| # | Domain | Authority | Referring domains | Web graph rank | Traffic rank |
|---|---|---|---|---|---|
| 6,163 | astrazeneca.com | 61 | 6,984 | 7,447 | Top 500K websites (Chrome) |
| 6,164 | manilatimes.net | 61 | 6,982 | 10,515 | Top 50K websites (Chrome) |
| 6,165 | crisisgroup.org | 61 | 6,980 | 7,782 | Top 1M websites (Chrome) |
| 6,166 | bitrix24.site | 61 | 6,980 | 10,675 | not in Chrome's top 1M |
| 6,168 | shopee.co.th | 61 | 6,975 | 9,095 | Top 5K websites (Chrome) |
| 6,169 | blogspot.ch | 61 | 6,965 | 8,743 | not in Chrome's top 1M |
| 6,170 | metacafe.com | 61 | 6,962 | 8,879 | not in Chrome's top 1M |
| 6,171 | camh.ca | 61 | 6,959 | 7,334 | Top 500K websites (Chrome) |
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FAQ
- What is the domain authority of astronomy.com?
- astronomy.com has a domain authority score of 61 out of 100 (above average for a business website), based on 6,976 referring domains and a web graph rank of 9,245 among 133 million domains; its traffic rank is Top 500K websites (Chrome). The score is our own open-data metric (0-100) and is not Moz Domain Authority or Ahrefs Domain Rating.
- How many backlinks does astronomy.com have?
- astronomy.com is linked to from 6,976 other domains in the Common Crawl web graph (release cc-main-2026-jul-aug-sep). This counts referring domains, not individual backlinks, and Common Crawl does not see the whole web, so commercial tools that crawl more will show larger numbers.
- How does astronomy.com rank among all websites?
- Its web graph rank (harmonic centrality) is 9,245 out of 133,241,980 ranked domains, which puts it in the top 0.01%. Its PageRank position is 35,386. Majestic Million ranks it #5,135.
- Is the astronomy.com authority score the same as Moz DA or Ahrefs DR?
- No. It is an independent score computed from open data (Common Crawl, Majestic Million, Chrome UX Report). It is consistent across all domains, so it works for comparing and filtering sites, but the numbers will not match the commercial tools.