Certificate:
Data:
    Version: 3 (0x2)
    Serial Number: 95 (0x5f)
    Signature Algorithm: sha1WithRSAEncryption
    Issuer: C=, O=, CN=
    Validity
        Not Before: Apr 22 16:42:11 2008 GMT
        Not After : Apr 22 16:42:11 2009 GMT
    Subject: C=, O=, CN=, L=, ST=
    Subject Public Key Info:
        Public Key Algorithm: rsaEncryption
        RSA Public Key: (1024 bit)
            Modulus (1024 bit):
                ...
                ...
                ...
            Exponent: 65537 (0x10001)
    X509v3 extensions:
        X509v3 Key Usage: critical
            Digital Signature, Key Encipherment
        X509v3 Extended Key Usage: critical
            Code Signing
        X509v3 Authority Key Identifier:
            keyid: ...

Signature Algorithm: sha1WithRSAEncryption
    a9:55:56:9b:9e:60:7a:57:fd:7:6b:1e:c0:79:1c:50:62:8f:
    ...
    ...
-----BEGIN CERTIFICATE-----
...
...
...
-----END CERTIFICATE-----

In This Certificate, Which is the public key? is Modulus? what does the Signature Algorithm, a9:55:56:... represent (is it message digest)? And what is between -----BEGIN CERTIFICATE----- & -----END CERTIFICATE-----, is That the whole certificate?

As I am novice, little bit confusing between the message digest and public key?

Thanks in Advance-opensid