<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="200">
<defs>
    <radialGradient id="star_grad">
        <stop offset="0%" style="stop-color: #faf589;"/>
        <stop offset="50%" style="stop-color: #fbf300;"/>
        <stop offset="100%" style="stop-color: #fbbc00;"/>
    </radialGradient>
    <filter id="star_filter">
        <feTurbulence baseFrequency=".04" result="ripples">
            <animate attributeName="baseFrequency" attributeType="XML" id="target" type="baseFrequency" dur="4s" repeatCount="indefinite" values="0.06;0.05;0.06" />
        </feTurbulence>
        <feMerge>
            <feMergeNode in="SourceGraphic" />
            <feMergeNode in="ripples" />
        </feMerge>
    </filter>
</defs>

<circle cx="100" cy="100" r="50" style="fill: url(#star_grad); filter: url(#star_filter);" />

</svg>