Well if you're a Silver (F2P) player you might be having trouble getting queued for the Sol System, since it's been woefully over burdened. Even us gold members have been having been having issues with excruciating loading times there.
You may be having issues with packet loss, or your bandwidth might be somehow limited. That could be causing your issue. You might be having issues with on demand patching as well, which if that's the case go in to options on the launcher, and uncheck it's box. Warning: This will make the launcher download EVERYTHING. Which will cause you to have to wait quite a long time for everything to be downloaded and patched.
It sounds like you have a problem with your internet. If it's a wireless service such as Verizon, AT&T, and T-Mobile, you may have run over your bandwidth limit for the month. If it's wireless such as Clearwire, or Sprint(only on unlimited), you may want to call customer support and check how stable service currently is.
If you have a landline based Broadband such as DSL, Cable, or T1 Reset your modem and router. If you're on Wifi you maybe experiencing some sort of interference that is causing you to drop too many packets to connect. If you're on Wifi, after a modem and router reset, connect your computer directly to the router with an ethernet cable.
Other than that, you may want to reinstall the game, and client. But it sure sounds like you're experiencing limited bandwidth for some reason.