There are few syntax errors.
1. Remove space from url.
2. Remove "?" from url.
3. add datatype as JSON, becase server is returning data in JSON format
Paste the below URL in browser and hit enter, you can see what it is returning
But this is still not going to work. Because it is a cross domain request returning JSON. and it is not allowed.
There is a workaround called JSONP, but for that you need a callback function which you dont have.
First you learn about these things. Gradually you will come to know.
JSON in AJAX