I have a general question about traceroute. (i'm running Knoppix STD 3.2)

Scenario:

All traffic going into the LAN runs through one router(or so I think), but all traffic leaving the router goes out through a different router. (They have different IP's)

I run a traceroute to the outgoing router and it hops right to it, showing only its IP.
However when I traceroute to the incoming router, the first and only hop is the outgoing router. But it has changed a little bit. There is an * before the IP of the outgoing router. What does this mean?

No its not,
1.***
2.<router ip>

It looks like,
1.*<routerip>

Can someone explain?

thanks