body {
    background-image: url("images/space2.jpg");
}
p {
	font-family: "georgia";
	font-size: 20px;
	padding-left: 20px;
	padding-right: 20px;
}
h1 {
	text-align: center;
	font-family: "verdana";
}
#left{
	background-color: white;
	float: left;
	width: 49%;
	height: 900px;
}
#right{
	background-color: white;
	float: right;
	width: 49%;
	height: 900px;
}
#body{
	margin: 0px auto;
	width: 70%;
	background-color: white;
}
#nav{
	background-color: lightskyblue;
	height: 50px;
	margin-bottom: 10px;
    top: 0;
    width: 100%;
	float: left;
	list-style-type: none;
}
#header{
	background-color: white;
	height: 80px;
	margin-bottom: 10px;
    width: 100%;
	float: left;
	z-index: -3;
}
#li {
    display: inline;
	font-family: "verdana";
	float: left;
}
li a:hover {
    background-color: #111;
	color: white;
}
li a {
    color: black;
    text-align: center;
    padding: 14px;
    text-decoration: none;
	top: 0;
}
#li_paragraph {
  	font-family: "georgia";
	font-size: 20px;
	padding-left: 20px;
	padding-right: 20px;
}
img {
    display: block;
    margin: auto;
    width: 70%;
}