body {

    font-family: 'Space Mono', monospace;
    background-image: url(https://images6.alphacoders.com/666/666446.jpg);
    background-size: 1920px 1080px;
    color: aliceblue;
}

.header {
    margin: 1rem;
    padding: 1rem;
    text-align: center;
    color: white;
}

.header1 {
    display: inline;
}
body {

    font-family: 'Space Mono', monospace;
    background-image: url(https://images6.alphacoders.com/666/666446.jpg);
    background-size: 1920px 1080px;
    color: aliceblue;
}

.header {
    margin: 1rem;
    padding: 1rem;
    text-align: center;
    color: white;
}

.header1 {
    display: inline;
}

.header2 {
    font-size: 18px;
    display: inline;
    padding-left: 0.5rem;
} 

.every{
    margin: 1rem;
    padding: 1rem;
    text-align: center;
    display: flex;
    justify-content: center;

}
.earth{
    margin-right: 2rem;
}
.mars{
    margin-left: 2rem;
}

.header2 {
    font-size: 18px;
    display: inline;
    padding-left: 0.5rem;
} 

.earth {
    display: inline-block;
}

.mars {

    display: inline-block;
}