What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

astronomy.com

https://astronomy.com· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

astronomy.com

$Desktop screenshot of astronomy.com$

$Mobile screenshot of astronomy.com$

Mobile

Sponsored

Hosting Provider

WP Engine

wpengine.com

IP Address

141.193.213.11

Server Location

🇺🇸 Austin, United States

ASN

AS209242

Organization

WPEngine, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

emma.ns.cloudflare.com.leo.ns.cloudflare.com.

Performance

Page Speed

1.8 MB

105 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

astronomyCustom

Technology Stack

24 Technologies Detected

Plugins

Astronomy Core Fc Top Banner Sheknows Infuse

Gravity Forms

Cdp Tracker Kalmbach Kserv Nexus Analytics Gravityformsrecaptcha

Analytics

Microsoft Clarity Segment

Meta Frameworks

Libraries

CSS Frameworks

Fonts

Tag Managers

Advertising

CDN

Customer Support

Security

SEO Analysis

A82/100

astronomy.comastronomy.com

Astronomy Magazine: Space News, Observing, Planets, Galaxies

Astronomy.com is for anyone who wants to learn more about astronomy and space, including planets, galaxies, asteroids, and NASA.

Title Length60 chars

Recommended: 50-60 chars

Description Length128 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (42/52)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

WAF

38d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

24.12.2025

Valid Until

24.03.2026

Subject Alternative Names (1)

www.astronomy.com

SHA-256 Fingerprint

3D:5B:5E:0D:14:E5:AB:02:AF:2F:D6:44:2F:2C:55:48:74:5D:0E:B1...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Sat, 14 Feb 2026 07:05:29 GMT

content-type

text/html; charset=UTF-8

content-encoding

⚡ Brotli(br)

vary

Accept-Encoding, Cookie

link

<https://www.astronomy.com/wp-json/>; rel="https://api.w.org...

set-cookie

kserv-session

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

ALT4.ASPMX.L.GOOGLE.com

ALT3.ASPMX.L.GOOGLE.com

ALT1.ASPMX.L.GOOGLE.com

ASPMX.L.GOOGLE.com

+1 more

Domain Information

astronomy.com

Domain Age

31y 1m

Created

10.01.1995

Expires

09.01.2029

Last Updated

24.07.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Data Protection Officer mentioned

Typography & Readability

Rubik + sans-serif

73/100

Readability

/30

32/40

18px · LH 1.33

Hierarchy

/20

18/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Rubik

Sans36px

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~79 CPL

Optimal (45–75)

36px

28px

22px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

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

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

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

Microsoft ClarityFree

User behavior and product analytics

Privacy & Cookies

CookieYesSMB

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

astronomy.com(6)googletagmanager.com(2)ads.blogherads.com(2)dkpklk99llpj0.cloudfront.net(1)dn1i8v75r669j.cloudfront.net(1)

Website Identity

astronomy.com

31 years old

GoDaddy.com, LLC📧 Google Workspace

Social Profiles

Facebook X (Twitter)Instagram LinkedIn YouTube

Sponsored

Last analyzed: 14 Feb 2026 at 07:06

Historical Analysis & Change Tracking