What are the contents of a certificate and how can I view it? I understand on a conceptual level that a certificate is nothing more than just a verified public key. The next question I have, is how exactly do I see the contents of a certificate? Apart from the public key it verifies are there other information that the certificate contains? Does the certificate also contains the signature of the public key etc. etc.
Pointers on how to further explore certificates would be appreciated!
Edit
I am mostly thinking about the ones used with HTTPS/TLS
HTTPS/TLS uses X.509 certificates generally. There is more detail here in the latest TLS specification.
You can view HTTPS certificates in a browser.
As per Wikipedia:
The structure of an X.509 v3 digital certificate is as follows:
Certificate

Version Number
Serial Number
Signature Algorithm ID
Issuer Name
Validity period

Not Before
Not After


Subject name
Subject Public Key Info

Public Key Algorithm
Subject Public Key


Issuer Unique Identifier (optional)
Subject Unique Identifier (optional)
Extensions (optional)

Certificate Signature Algorithm
Certificate Signature