Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 3.165.136.89 |
| Server Software | openresty |
| CDN | CDN (Hit from cloudfront) |
| Compression | gzip |
|
🔒 🟡 Mixed Content (9 HTTP resources) | The page is served over HTTPS but loads 9 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 3.165.136.89
Server Software openresty
CDN CDN (Hit from cloudfront)
Compression gzip
🔒 🟡 Mixed Content (9 HTTP resources) The page is served over HTTPS but loads 9 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://stsci.edu:443 | 301 | HTTP/2 301 |
| 2 | https://www.stsci.edu/ | 200 | HTTP/1.1 200 OK |
#1 URL https://stsci.edu:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.stsci.edu/
HTTP Status Code 200
Status HTTP/1.1 200 OK
Performance
| DNS Lookup | 6.2 ms |
| TCP Connect | 91.1 ms |
| TLS Handshake | 90.6 ms |
| Time To First Byte (TTFB) | 280 ms |
| Content Download | 84.6 ms |
| Total Response Time | 364.6 ms |
DNS Lookup 6.2 ms
TCP Connect 91.1 ms
TLS Handshake 90.6 ms
Time To First Byte (TTFB) 280 ms
Content Download 84.6 ms
Total Response Time 364.6 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; includeSubDomains |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ✔ nosniff |
| Referrer Policy | origin |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000; includeSubDomains
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ✔ nosniff
Referrer Policy origin
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Home | STScI |
| Meta Description | The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. |
| Canonical | https://www.stsci.edu/home |
| Open Graph Title | Home |
| Open Graph Description | The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. |
| Open Graph Image | https://www.stsci.edu/modules/stsci-www-assets/assets/fav... |
Title Home | STScI Meta Description The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. Canonical https://www.stsci.edu/home Open Graph Title Home Open Graph Description The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. Open Graph Image https://www.stsci.edu/modules/stsci-www-assets/assets/fav... Detected Technologies
| Technology | Google Analytics Google Tag Manager |
Technology Google Analytics Google Tag Manager
HTTP Headers
| Date
| Wed, 22 Jul 2026 22:42:09 GMT |
| Server
| openresty |
| Content-Type
| text/html;charset=UTF-8 |
| Cache-Control
| private |
| Content-Encoding
| gzip |
| X-content-type-options
| nosniff |
| X-xss-protection
| 1; mode=block; |
| X-Resolver-IP
| 18.235.143.165 |
| Strict-Transport-Security
| max-age=31536000; includeSubDomains |
| Vary
| accept-encoding |
| X-Cache
| Hit from cloudfront |
| Via
| 1.1 a97f872e6a14f227f3c3ea78467c0330.cloudfront.net (CloudFront) |
| X-Amz-Cf-Pop
| IAD55-P3 |
| X-Amz-Cf-Id
| 0DLZeci3xMRcaefoFr-VgQIGsNJePs_BOKtbpfWkzkxvN34mOfHbQQ== |
| Age
| 55 |
| Referrer-Policy
| origin |
| X-Forwarded-For
| 52.47.204.2 |
| Transfer-Encoding
| chunked |
Meta Tags
| X-ua-compatible | ie=edge |
| Viewport | width=device-width, initial-scale=1, user-scalable=yes |
| Description | The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives. |
| Target_country | us |
| Apple-mobile-web-app-capable | yes |
| Apple-mobile-web-app-status-bar-style | black-translucent |
| Apple-mobile-web-app-title | Q Starter Kit |
| Mobile-web-app-capable | yes |
| Theme-color | #fff |
| Application-name | Q Starter Kit |
| Msapplication-TileColor | #fff |
| Msapplication-TileImage |  |
| Msapplication-config | /modules/stsci-www-assets/assets/favicons/www/browserconfig.xml |
| Ucode | 7EjHDCsimuhXhSQbYRmjcRWav3ttb3oEyGA9w9gU |
Date Wed, 22 Jul 2026 22:42:09 GMT
Server openresty
Content-Type text/html;charset=UTF-8
Cache-Control private
Content-Encoding gzip
X-content-type-options nosniff
X-xss-protection 1; mode=block;
X-Resolver-IP 18.235.143.165
Strict-Transport-Security max-age=31536000; includeSubDomains
Vary accept-encoding
X-Cache Hit from cloudfront
Via 1.1 a97f872e6a14f227f3c3ea78467c0330.cloudfront.net (CloudFront)
X-Amz-Cf-Pop IAD55-P3
X-Amz-Cf-Id 0DLZeci3xMRcaefoFr-VgQIGsNJePs_BOKtbpfWkzkxvN34mOfHbQQ==
Age 55
Referrer-Policy origin
X-Forwarded-For 52.47.204.2
Transfer-Encoding chunked
