nso.edu

https://nso.edu· First analyzed 29 Apr 2026· Updated 29 Apr 2026

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nso.edu

Mobile

Sponsored

Hosting Provider

Oracle Cloud

oracle.com/cloud

IP Address

50.6.111.190

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Ashburn, United States

ASN

AS31898

Organization

Oracle Corporation

Server

Apache

Nameservers

ns2.nso.edu.ns1.nso.edu.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

610 ms10%

Speed Index

793 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

307 KB

48 requests

Image Optimization

Lazy LoadWebPResponsiveBunny Optimizer

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Extrav4.27.5Custom

by Elegant Themes

View Theme

Technology Stack

19 Technologies Detected

Plugins

Bloom Cred Frontend Editor Wp Views

Bluehost Wordpress Plugin

Newsletter

Jt Divi Filterable Grid

Libraries

Other

CSS Frameworks

Icon Libraries

Fonts

Analytics

Tag Managers

Web Servers

SEO Analysis

B73/100

Meta Tags14/15

Content3/12

Headings3/8

Technical24/25

E-E-A-T2/7

Images4/7

Links5/5

URL5/5

Social5/5

Freshness2/4

Mobile3/4

Indexability3/3

nso.edunso.edu

Home Page - NSO - National Solar Observatory

Learn how the NSF's National Solar Observatory (NSO) uses its solar observatories to learn about the Sun and how it influences Earth.

Title Length44 chars

Recommended: 50-60 chars (~274px / 580px)

Description Length133 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (8 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

8 URLs

8 sub-sitemaps

robots.txt

8 rules

Sitemap reference found

Local SEO

Local Search Readiness

22/100

Needs Work

7 11

Sponsored

AI & LLM Readiness

F31/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

8/25

Citation

2/25

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:3,842

Token eff.:Poor Structure

Structured Data

5 JSON-LD

Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary

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 (12)

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

14/15

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

1/15

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.

73/100

A+

38 mg

CO₂e / view

306.7 KB

Page Weight

90%

Cleaner Than

New Visitor

43 mg

Returning (cached)

22 mg

Annual (10K/mo)

4.5 kg

Emission Segments

Data Center

9 mg

Network

9 mg

Device

20 mg

Resource Breakdown

Images

201.3 KB

HTML

105.4 KB

Green Hosting Not Verified

Oracle Cloud

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.03.2026

Valid Until

21.06.2026

Subject Alternative Names (8)

diglib-dev.nso.edueo-dev.nso.eduintranet.nso.edunso.edunsokp-dev.nso.edunsosp-dev.nso.edusolarnews.nso.eduwww.nso.edu

SHA-256 Fingerprint

60:4F:08:9F:8E:64:72:C5:D6:3A:5E:1E:25:6A:78:D2:21:44:44:30...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0)

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=UTF-8

date

Wed, 29 Apr 2026 14:01:41 GMT

expires

Wed, 29 Apr 2026 14:01:41 GMT

last-modified

Wed, 29 Apr 2026 11:36:24 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt3.aspmx.l.google.com

aspmx.l.google.com

alt4.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

nso.edu

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.

61/100

Not Mobile Friendly45 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.

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Oswald + Open Sans

WCAG Partial

54/100

Readability

/30

17/30

14px · LH 1.70

Hierarchy

/20

6/20

WCAG

/25

15/25

1:1 min contrast

Performance

/25

16/25

2 fonts · 4 req

Heading Font

Oswald

Display

Body Font

Open Sans

Sans14px

Contrast Ratio

1:1

21 issues

Reading Comfort

~42 CPL

Narrow lines

22px

20px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

⚠️ Hard to read: Flesch score 35/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 21 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.

Buy on MyFontsFluid Type (rem)Flesch 35

Color Palette

6 unique colors

Dark

#2e2e2e

Other· 53.9%

#3f5062

Primary· 22.5%

#65727e

Secondary· 1.8%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nso1.b-cdn.net(1)

Website Identity

National Solar Observatory

Organization

Learn how the NSF's National Solar Observatory (NSO) uses its solar observatories to learn about the Sun and how it influences Earth.

webhelp@nso.edu

nso.edu/

Location detected: 🇺🇸 United Statesvia ip

📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)Instagram YouTube

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Last analyzed: 29 Apr 2026 at 14:02

Historical Analysis & Change Tracking