HTTPS is necessary for secure transactions on websites
because it encrypts the data sent between your browser and
the server so attackers on the network cannot read sensitive
information like passwords or credit card numbers, it ensures
the data cannot be secretly altered in transit, and it uses
digital certificates to verify that you are really connected
to the legitimate site rather than a fake one, which together
protects users from eavesdropping, tampering, and many forms
of fraud during online purchases, banking, and logins.
However, on websites that only serves static content, such as
edu-observatory.org there is no security implications at all,
because such a website wouldn't be vulnerable to malware or
hacking anyway. For website like these, HTTP is OK and secure.
To allow Apple's Safari to open HTTP only websites, go to
Safari > Settings > Security
Uncheck "Warn before connecting to a website over HTTP".
sam.wormley@icloud.com