=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Date: Tue, 30 Nov 2021 08:16:22 GMT
Server: Apache
Location: https://hubblesite.org/explore_astronomy/gsky/
Connection: close
Content-Type: text/html; charset=iso-8859-1

HTTP/1.1 301 Moved Permanently
Date: Tue, 30 Nov 2021 08:16:24 GMT
Server: Apache
Location: https://hubblesite.org/science
Connection: close
Content-Type: text/html; charset=iso-8859-1

HTTP/1.1 200 
Date: Tue, 30 Nov 2021 08:16:24 GMT
Content-Type: text/html;charset=UTF-8
Expires: Wed, 09 May 1979 05:30:00 GMT
Cache-Control: no-cache, no-store, must-revalidate, proxy-revalidate, max-age=0
Pragma: no-cache
vary: accept-encoding
X-Proxy-Cache: MISS
X-Proxy-Cache: MISS
Set-Cookie: JSESSIONID=04C5E5FBE0A9277A13E34DAA032B4257; Path=/; HttpOnly
Via: 1.1 hubblesite.org
Host: hubblesite.org
Connection: close

Request headers
================
HEAD /science HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: hubblesite.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.