#soleil{
    width:60px;
    height: 60px;
    left: 47%;
    top: 47%;
    position:absolute;
}

#mercure{
    width: 10px;
    height: 10px;
    position:absolute;
}

#vénus{
    width: 17px;
    height: 17px;
    position:absolute;
}

#terre{
    width: 20px;
    height: 20px;
    position:absolute;
}

#mars{
    width: 13px;
    height: 13px;
    position:absolute;
}

#jupiter{
    width: 50px;
    height: 50px;
    position:absolute;
}

#saturne{
    width: 40px;
    height: 40px;
    position:absolute;
}

#uranus{
    width: 30px;
    height: 30px;
    position:absolute;
}

#neptune{
    width: 30px;
    height: 30px;
    position:absolute;
}

body{
    background-color: black;
    overflow: hidden;
}

.astre:hover{
    cursor: pointer;
}

#retour:hover{
    cursor: pointer;
}

#pause:hover{
cursor: pointer;
}

#titre{
    color: white;
    padding-left: 41%;
    position: absolute;
    z-index: 2;
}

#retour{
    padding-left: 4%;
    z-index: 3;
}

#pause{
    padding-left: 1%;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    z-index: 3;
}

h1{
    font-family: 'Arial', sans-serif;
    position: absolute;
}

#retour:hover{
    cursor: pointer;
}

#pause:hover{
    cursor: pointer;
}

#infos{
    font-size:x-large;
    z-index: 2;
    font-family: 'Arial', sans-serif;
    position: absolute;
    padding-left: 5%;
    padding-top: 5%;
    color: white;
}

#background{
    position: absolute;
}