Sending multiple objects with node.js, mysql and socket.io

I am using node.js, mysql and socket.io and I would like to get a large amount of data from my mysql database. It will be a set of stars with xy location coords. I can get the data line by line as shown with the row var and it logs to the node.js console correctly. I am also able to get standard messages back to the client via the emit line. I can't however send star data to the client, it just returns a blank array if I try and use an array to store the row var each time.

function starUpdate(sessionid){
        var query = "SELECT * FROM stars";
        var conn = mysql.createConnection({
          host     : 'localhost',
          user     : 'dbuser',
          password : 'dbpass',
          database : 'dbname'
        });     
        //console.log("Running query: " + query);
        conn.query(query, function(err, rows, fields) {
        if (!err)
                for (var i = 0; i < rows.length; i++) {
                        var row = rows[i];
                        console.log(row);
                }
        else
                result = 'error';
        });
        conn.end();     
        console.log("Star data: " + result);
        //server.to(sessionid).emit("starupdate",result);
}

When I do an individual output of "row" to the console I get this:

{ star_id: 1,
  star_type: 1,
  star_x: 200,
  star_y: 200,
  star_alpha: 1,
  star_status: 1 }
{ star_id: 2,
  star_type: 2,
  star_x: 200,
  star_y: 250,
  star_alpha: 1,
  star_status: 1 }
{ star_id: 3,
  star_type: 3,
  star_x: 200,
  star_y: 300,
  star_alpha: 1,
  star_status: 1 }

How do I setup the result variable and enter the rows into it so my emit line transmits all the data to be processed on the client end?