I have all the tags and everything and yet nothing is showing up. Not even the heading. I am using notepad++ for this and I have used it for HTML with no problems(though that is mostly copying HTML from an online code editor).

Does it have to do with the last closing tag? I don't think so since I have added this closing tag to online editors with no difference at all.

Here is my code:

```html
<!DOCTYPE html>
<html>
<head>

</head>
<body>
<h1>Kepler Bb</h1>
<p>This is a planet in</p>
</body>
</html>
</!DOCTYPE>
```

For some reason, when I use notepad++ I get an HTML error(encoding not declared error) but when I use an online editor, I have no problems at all. Why?