he center node
        currentAngle = 0,
        positions = [],
        nodesInThisCircle,
        circumference;

   
    // Place the center node
    if (data.length > 0 && data[0].imageSrc !== null) {
        positions.push({ twitterUsername: data[0].twitterUsername, imageSrc: data[0].imageSrc, x: center.x, y: center.y, radius: centralNodeRadius });
    }

    // Start from the second item if the first one is used for the center node
    data.slice(1).forEach((d, i) => {
        if (d.imageSrc === null)