#falling-rocket {
    width: 125px;
    height: 125px;
    background: url(images/moon.01/falling-rocket.gif) top left no-repeat;
    position: absolute;
    top: 0;
    left: -9999px;
}

#rocket-crash {
    width: 125px;
    height: 125px;
    background: url(images/moon.01/rocket-crash.gif) 0 0 no-repeat;
    position: absolute;
    top: -146px;
    left: -9999px;
}