"Show log" question off a Cisco router

So this is probably a very easy question and I've done some searching on the net but can't seem to find an answer.

Does anyone know what the asterisks * means when in front of any given log entry?
I noticed that some log entries have them, yet some don't.

Example:

*Apr 16 10:53:14.454 EDT: %PIM-5-DRCHG: DR change from neighbor 0.0.0.0 to 10.0.0.2 on interface GigabitEthernet0/1
*Apr 16 11:07:19.002 EDT: %CLEAR-5-COUNTERS: Clear counter on all interfaces by localadmin on vty0 (10.10.2.21)
Apr 16 17:21:40.949 EDT: %PIM-5-NBRCHG: neighbor 10.0.0.1 DOWN on interface GigabitEthernet0/1 non DR
Apr 16 17:21:53.494 EDT: %PIM-5-NBRCHG: neighbor 10.0.0.1 UP on interface GigabitEthernet0/1

I know it's meaningless but I'm curious. Any insight would be greatly appreciated.

Thanks

Well, I think I may have figured it out. I think I'm getting the asterisks before the log entry because the running clock on the router isn't sync'd with the onboad clock. I'm going to try to sync the two.
I think I can do this by defining the router as the NTP master.

Cheers!

Let us know if that fixes the asterisks!