physicsoftheuniverse.com

https://physicsoftheuniverse.com· First analyzed 20 May 2026· Updated 20 May 2026

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Mobile

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Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.21.56.97

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

alex.ns.cloudflare.com.meg.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

264 ms10%

Speed Index

343 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

35 KB

27 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

7 Technologies Detected

CSS Frameworks

Bootstrapv4.0.0

Tailwind CSS

Advertising

Google Ads Google AdSense

Libraries

jQueryv3.3.1

Analytics

Microsoft Clarity

CDN

Cloudflare

SEO Analysis

D54/100

Meta Tags9/15

Content10/12

Headings6/8

Technical11/21

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

physicsoftheuniverse.comphysicsoftheuniverse.com

The Physics of the Universe - Difficult Topics Made Understandable ...

The Physics of the Universe - Difficult Topics Made Understandable - The Big Bang, Black Holes, Quantum Theory, Relativity, Cosmological Theories, etc

Title truncated.

Title Length150 chars

Recommended: 50-60 chars (~892px / 580px)

Description Length150 chars

Recommended: 120-160 chars

Issues (1)

• Title is too long (150 chars, ~892px). Will be truncated in search results.

10 issues found

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Local SEO

Local Search Readiness

6/100

Poor

2 13 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

F36/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

9/25

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:3%

Words:1,043

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary30w

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

65/100

Passed

Critical

Warnings

Images & Alt Text

10/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

16/20

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

7/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

2/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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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.

68/100

A+

4 mg

CO₂e / view

35.3 KB

Page Weight

95%

Cleaner Than

New Visitor

4 mg

Returning (cached)

2 mg

Annual (10K/mo)

432 g

Emission Segments

Data Center

<0.001 g

Network

1 mg

Device

2 mg

Resource Breakdown

JavaScript

300 B

HTML

35.0 KB

Green Hosting Verified

Cloudflare

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

WAF

47d

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+H3

Valid From

07.04.2026

Valid Until

06.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

physicsoftheuniverse.comwww.physicsoftheuniverse.com

SHA-256 Fingerprint

D0:0C:F6:8B:7D:8F:2B:C4:64:63:54:85:57:4A:E7:60:49:79:EF:BD...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin

age

405649

alt-svc

h3=":443"; ma=86400

cache-control

🔵 1 Week(public, max-age=691200)

cf-cache-status

HIT

cf-ray

9fec303729963e87-BOS

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

physicsoftheuniverse.com

Domain Age

17y 3m

Created

27.01.2009

Expires

27.01.2027

Last Updated

28.12.2025

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Script

Cookie Consent Banner

Cookie Script

GDPR Indicators

Cookie consent banner detected

CMP: Cookie Script

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.

67/100

Mobile Friendly49 breakpoints

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.

Viewport

width=device-width, initial-scale=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial + -apple-system

WCAG AA

81/100

Readability

/30

24/30

16px · LH 1.65

Hierarchy

/20

15/20

1.06x ratio · ✓ H1→H6

WCAG

/25

22/25

6.41:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans17px

Body Font

-apple-system

Sans16px

Contrast Ratio

6.41:1

WCAG AA (≥4.5:1)

Reading Comfort

~40 CPL

Narrow lines

17px

16px

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

⚠️ Hard to read: Flesch score 40/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.4:1).

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

⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 40

Color Palette

6 unique colors

21:1 AAA Light

#ffffff

Background· 39.3%

#000000

Background· 38.400000000000006%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Microsoft ClarityFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

scripts.clarity.ms(1)clarity.ms(1)code.jquery.com(1)custom-menu.js(1)maxcdn.bootstrapcdn.com(1)

Website Identity

physicsoftheuniverse.com

17 years old

Location detected: 🇨🇦 Canadavia ip

Cloudflare, Inc.en

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Last analyzed: 20 May 2026 at 14:57

Historical Analysis & Change Tracking