StackOptic
Back to Search
exoplanet.eu favicon

exoplanet.eu

https://exoplanet.eu· First analyzed 02 May 2026· Updated 02 May 2026
Export
exoplanet.eu
Desktop screenshot of exoplanet.eu
Mobile screenshot of exoplanet.eu
Mobile

Sponsored

Hosting Provider

Observatoire de Paris

IP Address

145.238.186.74

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Montreuil, France

ASN

AS2200

Organization

Observatoire de Paris

Server

Apache

Nameservers

ns1-p.obspm.fr.ns2-m.obspm.fr.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
582 ms10%
Speed Index
757 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4 MB
20 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Observatoire de Paris

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

3 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Apache

SEO Analysis

B71/100
18
8
1
Meta Tags10/15
Content12/12
Headings5/8
Technical12/21
E-E-A-T5/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
E
exoplanet.euexoplanet.eu

Encyclopaedia of exoplanetary systems

This encyclopaedia provides the latest detections and data announced by professional astronomers on exoplanetary systems. It contains objects lighter than 60...

Description truncated.
Title Length37 chars

Recommended: 50-60 chars (~225px / 580px)

Description Length423 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

9 issues found

Upgrade to view details

Local SEO

Local Search Readiness

8/100
Poor
3 12 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D52/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
5/25
Citation
15/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
navheader/footer
Text ratio:14%
Words:559
Token eff.:Optimal
Sections/1K:1.8
Depth:2/5

Structured Data

1 JSON-LD
NewsArticle×1.2Organization×1.1

Citation Readiness

Opening Summary61w
Descriptive Headingsavg 2w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (7)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
A
80/100
11
Passed
3
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
18/100
F
503 mg
CO₂e / view
4.0 MB
Page Weight
15%
Cleaner Than
New Visitor
575 mg
vs
Returning (cached)
288 mg
Annual (10K/mo)
60.4 kg
Emission Segments
Data Center
112 mg
Network
121 mg
Device
270 mg
Resource Breakdown
JavaScript
167.1 KB
Images
413.5 KB
CSS
3.4 MB
HTML
6.0 KB
Green Hosting Not Verified
Observatoire de Paris
6 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

88%Very Good
Static / Informational

HTTPS

No WAF

138d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Gandi SAS

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

18.09.2025

Valid Until

17.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (3)

exoplanet.euscholar.exoplanet.euwww.exoplanet.eu

SHA-256 Fingerprint

D5:5F:72:EC:78:29:38:7B:7D:CA:BD:9F:4C:0B:95:F5:19:12:47:F5...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Sat, 02 May 2026 21:59:23 GMT
keep-alive
timeout=15, max=99
referrer-policy
same-origin
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

0

SPF
DKIM
DMARC

Domain Information

exoplanet.eu

DNSSEC
Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
45/100
Not Mobile Friendly
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Lato

WCAG Partial
63/100
Readability
/30
24/30

16px · LH 1.50

Hierarchy
/20
12/20

4x ratio

WCAG
/25
16/25

1:1 min contrast

Performance
/25
11/25

1 font · 4 req

Heading Font

Lato

Sans64px

Body Font

Lato

Sans16px

Contrast Ratio

1:1

5 issues

Reading Comfort

~34 CPL

Narrow lines
64px
h1
56px
h2
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

❌ Broken heading hierarchy: 2 level skip(s). Screen readers rely on sequential headings (h1→h2→h3).

✅ Strong hierarchy: Headlines are 4.0x larger than body text.

Buy on MyFontsFlesch 42

Color Palette

10 unique colors
Light
#ffffff
Background· 32.4%
#032056
Primary· 13%
#053d7b
Accent· 11.6%
#01061d
Accent· 8%
#444e5b
Secondary· 7.1%
#075394
Accent· 6.5%
#acdcea
Accent· 6.1%
#3b8fc4
Accent· 6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

3 Resources

2
Scripts
1
Styles
1
Async
1
Defer

Top Script Sources

analytics.obspm.fr(1)local(1)

Website Identity

exoplanet.eu

vo.exoplanet@obspm.fr
Location detected: 🇫🇷 Francevia ip
en

Sponsored

Last analyzed: 02 May 2026 at 21:59

Historical Analysis & Change Tracking