Blackhole

Show HN: Physically accurate black hole you can put in your room

Estimated origin: India

Added July 23, 2026 · Last analysed July 23, 2026 · via Hacker News · 73% unique tagline

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StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 23 July 2026; the live site may have changed since.

Blackhole still has work before launch. Visible gaps: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Hacker News on July 23, 2026. The site is hosted on OVH SAS in France, with a domain registered in 2013. The crawl picked up 4 technologies on this site, covering developer tools, javascript library, security, and servers. The stack includes HSTS, nginx, and Three.js.

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1.7

StackScope Score

Poor

41/100 Launch Readiness

Partially ready

1/6 Security Headers

Poor

0/3 Legal

Missing

0/2 Crawl files

Missing

86/100 Performance

Fast

Vibe Score 0 · No AI signals

How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (4)

Infrastructure

Security	HSTS
Server	nginx

Build & Framework

Developer tools	Vite
JavaScript library	Three.js

Infrastructure

Network

OVH - OVH SAS, FR

AS16276 · FR

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

Green hosting

Green hosted

Host runs on renewable energy. Data from The Green Web Foundation.

SSL Certificate

Let's Encrypt

Valid 7 Jul 2026 to 5 Oct 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

13 years

Registered Aug 2013 · NAMECHEAP

Email Security

✓

SPF ~all (via apex plav.in) Soft-fail (~all). Common and accepted.

✓

DKIM (via apex plav.in) Detected on apex plav.in

✗

DMARC p=none (via apex plav.in) None (p=none). Monitoring only.

MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.

TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

⚠

Custom title and meta description (partial) missing meta description

✓ Responsive viewport meta tag

✓ Semantic HTML (nav, main, article)

- Open Graph tags (title, image, description)

- Canonical URL declared

- Twitter card meta tags

- Favicon present

Performance How?

277 ms Server response

59% Faster than peers

3144 ms Largest contentful paint

0.00 Cumulative layout shift

435 KB Page weight

206 KB Image weight

0 Console errors

0 Failed requests

⚠ 4 images: 4 oversized, 4 without width/height, 4 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared

✗ llms.txt published

✓ No AI bots blocked in robots.txt

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✗ robots.txt

✗ sitemap.xml

✗ security.txt

✗ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

Detection works best on English language sites.

Security Headers (1/6)

✗

Referrer-Policy

✗

X-Frame-Options

✗

Permissions-Policy experimental (check browser support)

✗

X-Content-Type-Options

✗

Content-Security-Policy

✓

Strict-Transport-Security

–

X-XSS-Protection deprecated (use Content-Security-Policy)

Build

1 JS files

0 CSS files

0 Third-party domains

Brand Colours

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