greenbankobservatory.org

https://greenbankobservatory.org· First analyzed 17 May 2026· Updated 17 May 2026

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Hosting Provider

National Radio Astronomy Observatory

IP Address

192.33.116.7

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Charlottesville, United States

ASN

AS12118

Organization

National Radio Astronomy Observatory

Server

Apache

Nameservers

sadira.gb.nrao.edu.zia.aoc.nrao.edu.cv3.cv.nrao.edu.

Performance

Core Web Vitals

Weight

First Contentful Paint

2.2 s10%

Speed Index

2.9 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

9.3 MB

171 requests

Image Optimization

Lazy LoadWebPResponsiveJetpack Photon (WordPress)

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Twenty Twenty-Fourv1.3

by the WordPress team

View Theme

Technology Stack

32 Technologies Detected

Plugins

Gutenberg

Sticky Block Kadence Blocks Modern Events Calendar Master_Qr Give Give Fee Recovery Give Form Field Manager Email Encoder Bundle Give Recurring Simple Lightbox A Z Listing Team Members Pro Nextend Smart Slider3 Pro Page Links To Megamenu

Libraries

Underscore.js Moment.js Lightbox

CSS Frameworks

Frameworks

UI Components

Icon Libraries

Fonts

Analytics

Web Servers

Languages

SEO Analysis

B72/100

Meta Tags14/15

Content3/12

Headings3/8

Technical24/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness0/4

Mobile4/4

Indexability3/3

greenbankobservatory.orggreenbankobservatory.org

Green Bank Observatory - Home of the GBT

The first national radio astronomy observatory, founded in 1957. Supported by the National Science Foundation and operated by Associated Universities,

Title Length40 chars

Recommended: 50-60 chars (~259px / 580px)

Description Length150 chars

Recommended: 120-160 chars

Issues (3)

• Very thin content (8 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (17/28) — critical for accessibility and SEO

4 issues found

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Crawlability

Sitemap

Type: standard

144 URLs

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100

Needs Work

6 11

Sponsored

AI & LLM Readiness

D45/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

11/25

Citation

7/25

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:1%

Words:543

Token eff.:Optimal

Structured Data

7 JSON-LD

Person×1.3Organization×1.1WebSiteEventBreadcrumbListSearchAction

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

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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.

75/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

9/20

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

11/15

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

ARIA & Roles

5/15

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

2 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.

29/100

1.18 g

CO₂e / view

9.3 MB

Page Weight

Cleaner Than

New Visitor

1.35 g

Returning (cached)

676 mg

Annual (10K/mo)

142.1 kg

Emission Segments

Data Center

264 mg

Network

284 mg

Device

635 mg

Resource Breakdown

JavaScript

1.7 MB

Images

6.7 MB

CSS

903.3 KB

Fonts

2.9 KB

HTML

54.7 KB

Green Hosting Not Verified

National Radio Astronomy Observatory

8 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

166d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

15.04.2026

Valid Until

30.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.greenbankobservatory.orggreenbankobservatory.org

SHA-256 Fingerprint

A0:1B:2E:C8:38:F1:CC:28:0F:7F:76:92:FD:17:3A:5C:0B:B3:20:E4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Sun, 17 May 2026 08:55:05 GMT

keep-alive

timeout=5, max=100

link

<https://greenbankobservatory.org/wp-json/>; rel="https://ap...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

io.gb.nrao.edu

Domain Information

greenbankobservatory.org

Domain Age

11y 7m

Created

30.09.2014

Expires

30.09.2027

Last Updated

14.11.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

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.

85/100

Mobile Friendly64 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

1 recommendation

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Typography & Readability

Ubuntu + Pontano Sans

WCAG Partial

55/100

Readability

/30

16/30

13px · LH 1.55

Hierarchy

/20

6/20

WCAG

/25

17/25

1:1 min contrast

Performance

/25

16/25

2 fonts · 7 req

Heading Font

Ubuntu

Sans

Body Font

Pontano Sans

Sans13px

Contrast Ratio

1:1

17 issues

Reading Comfort

~31 CPL

Narrow lines

32px

24px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.55 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 17 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

✅ Lean font stack: 2 font families keeps load times fast.

GGoogle Fonts Buy on MyFontsFluid Type (rem)

Color Palette

10 unique colors

4.67:1 AA Light

#ffffff

Background· 40.800000000000004%

#73756d

Other· 4.6%

#273432

Primary· 13.7%

#385045

Secondary· 11.5%

#101712

Secondary· 6.6%

#496755

Secondary· 4%

#493c3a

Secondary· 2.4%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

c0.wp.com(10)greenbankobservatory.org(8)gstatic.com(1)maps.googleapis.com(1)

Website Identity

Green Bank Observatory

Organization

Enjoy a guided tour of the Green Bank Observatory campus! This ticket Includes a 30-min presentation followed by a 30-min tour on our radio-quiet bus. Book Now!

greenbankobservatory.org/

11 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLCen-US

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 17 May 2026 at 08:55

Historical Analysis & Change Tracking