If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:astronomy.com/-/media/Images/Homepage/Sliders/circ/P29562_280x454.jpg?mw=28...
Url ContentJPEG Image
MIME Type / Internet Media Typeimage/jpeg
MIME Type image
File Extension.jpeg, .jpg
More Details (link to:)RFC 1314
Powered by: Very Tiny URL Shortener at https://vturl.net VeryTinyURL

Header

HTTP/1.1 200 OK
Cache-Control private, max-age=604800
Content-Length 40145
Content-Type image/jpeg
Expires Mon, 02 Oct 2017 08:00:15 GMT
Last-Modified Mon, 05 Dec 2016 15:02:28 GMT
Accept-Ranges bytes
Server Microsoft-IIS/7.0
Content-Disposition inline; filename="P29562_280x454.jpg"
X-AspNet-Version 4.0.30319
X-Powered-By ASP.NET; Sitecore CMS
Date Mon, 25 Sep 2017 08:00:14 GMT
Set-Cookie NSC_xxx.Btuspopnz.dpn_IUUQ_WJQ=ffffffffc3a0febf45525d5f4f58455e445a4a423660;path=/;httponly

Load Info

page size40145
load time (s)0.204516
redirect count0
speed download0
server IP173.226.48.53


* all occurrences of the string "http://" have been changed to "htt???/"