How can I retrieve the value of an attribute supported by Oracle?

1. Tablespace FlashBack

CREATE TABLESPACE TS_Physical
    DATAFILE
        '\physical_df.dbf'
            SIZE 1024000
            AUTOEXTEND OFF
    BLOCKSIZE 8192
    LOGGING
    FORCE LOGGING
    ONLINE
    EXTENT MANAGEMENT
        LOCAL AUTOALLOCATE
    SEGMENT SPACE MANAGEMENT AUTO
    FLASHBACK ON;

I looked up USER_TABLESPACES and DBA_TABLESPACES that store tablespace information, but there is no entry called FlashBack.

SELECT * FROM USER_TABLESPACES;
SELECT * FROM DBA_TABLESPACES;

I obviously have flashback on. How can I query whether the tablespace is using flashback or not?

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V$TABLESPACE.FLASHBACK_ON

SQL> select name,flashback_on from v$tablespace;

NAME                           FLASHBACK_ON
------------------------------ ------------
SYSTEM                         YES
SYSAUX                         YES
UNDOTBS1                       YES
TEMP                           YES
USERS                          YES