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earthsky.org

https://earthsky.org· First analyzed 14 Feb 2026· Updated 14 Feb 2026
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earthsky.org
Desktop screenshot of earthsky.org
Mobile screenshot of earthsky.org
Mobile

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Hosting Provider

cloudflare.com

IP Address

104.26.10.45

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

alex.ns.cloudflare.com.nina.ns.cloudflare.com.

Performance

Page Speed

3 MB
110 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Headless
⚙️ SSR
Decoupled
API
Data Source
Headless CMS
Strapi
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Detected API Sources

https://cdn.id5-sync.com/api/1...

SEO Analysis

D58/100
10
0
3
E
earthsky.orgearthsky.org

EarthSky | Updates on your cosmos and world

No description available for this page.

Title Length43 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

  • Missing meta description - important for click-through rates
  • Missing H1 tag - every page should have one H1
  • Many images missing alt text (51/52)

Crawlability

Sitemap

Type: standard

robots.txt

19 rules

Sitemap reference found

Sponsored

Sponsored

F

Security Score

36%Critical
Interactive

HTTPS

WAF

58d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.01.2026

Valid Until

13.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

earthsky.org*.earthsky.org

SHA-256 Fingerprint

23:0A:42:F1:31:08:2F:C7:AF:A2:39:60:38:60:21:A8:D5:3C:27:F3...

Top Recommendations

Security recommendation preview

HTTP Headers

Developer Console

age
29819
cache-control
🟡 0s(public, s-maxage=31536000, max-age=0, must-revalidate)
cf-cache-status
HIT
cf-ray🇩🇪 Frankfurt
9cda0a481fff71a9-FRA
content-encoding
Brotli(br)
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Google Workspace

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx2.googlemail.com
aspmx3.googlemail.com
alt2.aspmx.l.google.com
aspmx.l.google.com

+1 more

Domain Information

earthsky.org

Domain Age
25y 6m

Created

26.07.2000

Expires

26.07.2029

Last Updated

09.09.2025

Registrar

GoDaddy.com, LLC

DNSSEC
Not Enabled

Privacy & Compliance

consentmanager

Cookie Consent Banner
consentmanager
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: consentmanager
Privacy policy page linked

Typography & Readability

Open Sans + sans-serif

53/100
Readability
/30
20/40

12px · LH 1.67

Hierarchy
/20
8/25
WCAG
/25
15/15

Contrast: undefined

Performance
/25
13/20

1 font

Heading Font

Open Sans

Sans

Body Font

sans-serif

Sans12px

Contrast Ratio

--

Reading Comfort

Single Font Family

left aligned
28px
h2
22px
h3
18px
h4
12px
p

❌ Critical: 12px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.67 ratio ensures comfortable reading.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

✅ Clean layout: Consistent left alignment throughout.

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

1

Email marketing and automation platforms

Behavior Analytics

2

User behavior and product analytics

Privacy & Cookies

1

Cookie consent and privacy compliance tools

3

Categories

4

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

Ad Networks

Google Ad ManagerAmazon Publisher ServicesRaptive (AdThrive)Prebid.js

Sponsored

Scripts & Styles

30 Resources

20
Scripts
10
Styles
10
Async
0
Defer

Top Script Sources

earthsky.org(4)ads.adthrive.com(3)securepubads.g.doubleclick.net(2)googletagmanager.com(2)cdn.id5-sync.com(1)

Website Identity

earthsky.org

25 years old
GoDaddy.com, LLC📧 Google Workspace

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Last analyzed: 14 Feb 2026 at 05:07

Historical Analysis & Change Tracking