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astronomynotes.com

https://astronomynotes.com· First analyzed 15 May 2026· Updated 15 May 2026
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astronomynotes.com
Desktop screenshot of astronomynotes.com
Mobile screenshot of astronomynotes.com
Mobile

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Hosting Provider

Oracle Cloud
oracle.com/cloud

IP Address

216.172.169.178

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Phoenix, United States

ASN

AS31898

Organization

Oracle Corporation

Server

Nginx

CDN

Proxy Cache

Nameservers

ns1.bluehost.com.ns2.bluehost.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
265 ms10%
Speed Index
344 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
36 KB
13 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Oracle Cloud
CDN
Proxy Cache

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginxv1.27.2

SEO Analysis

D50/100
13
11
2
Meta Tags4/15
Content12/12
Headings8/8
Technical8/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
A
astronomynotes.comastronomynotes.com

Astronomy Notes

No description available for this page.

Title Length15 chars

Recommended: 50-60 chars (~95px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

  • • Missing meta description — important for click-through rates in SERPs
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

3 rules

Local SEO

Local Search Readiness

11/100
Poor
3 12 2

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

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AI & LLM Readiness

D43/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
10/25

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
Text ratio:54%
Words:2,559
Token eff.:Optimal
Sections/1K:2

Structured Data

No Schema

Citation Readiness

Opening Summary22w
Descriptive Headingsavg 5.4w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
Upgrade to view recommendations

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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.
B
79/100
12
Passed
3
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
14/20
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.
53/100
A+
4 mg
CO₂e / view
36.0 KB
Page Weight
95%
Cleaner Than
New Visitor
5 mg
vs
Returning (cached)
3 mg
Annual (10K/mo)
528 g
Emission Segments
Data Center
1 mg
Network
1 mg
Device
2 mg
Resource Breakdown
Images
17.1 KB
HTML
10.6 KB
Other
8.3 KB
Green Hosting Not Verified
Oracle Cloud
5 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

188d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

05.05.2026

Valid Until

19.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

astronomynotes.comwww.astronomynotes.com

SHA-256 Fingerprint

A9:03:4C:DF:EF:F1:6B:E0:94:99:3B:94:B4:BF:3E:0B:FB:62:D9:57...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
content-encoding
📦 Gzip(gzip)
content-length
10521
content-type
text/html
date
Fri, 15 May 2026 04:48:39 GMT
host-header
Y2xvdWQuYmx1ZWhvc3QuY29t
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

45

SPF
DKIM
DMARC

MX Records (1)

mail.astronomynotes.com

Domain Information

astronomynotes.com

Domain Age
25y 10m

Created

30.06.2000

Expires

30.06.2026

Last Updated

15.06.2025

Registrar

Bluehost Inc.

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
40/100
Not Mobile Friendly1 breakpoint
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.
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Times New Roman

WCAG AAA
79/100
Readability
/30
22/30

16px · LH --

Hierarchy
/20
19/20

2x ratio · ✓ H1→H6

WCAG
/25
24/25

9.4:1 min contrast

Performance
/25
14/25

1 font

Heading Font

Times New Roman

Serif32px

Body Font

Times New Roman

Serif16px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~38 CPL

Narrow lines
32px
h1
24px
h2
19px
h3
16px
h4
16px
p

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

⚠️ Hard to read: Flesch score 44/100. Simplify sentences for wider reach.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 44

Color Palette

8 unique colors
2.91:1 Fail Light
#ffffff
Background· 83.6%
#9497a4
Secondary· 3.9%
#dae6e5
Primary· 2.4%
#706f91
Secondary· 1.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

5 Resources

3
Scripts
2
Styles
2
Async
0
Defer

Top Script Sources

cse.google.com(2)google.com(1)

Website Identity

astronomynotes.com

25 years old

Author oforiginalcontent:Nick Strobel

Location detected: 🇺🇸 United Statesvia ip
Bluehost Inc.en

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Last analyzed: 15 May 2026 at 04:49

Historical Analysis & Change Tracking