The NASA Astronomy Picture of the Day in every new tab you open.
Every day NASA uploads a new astronomy picture. Now, with Telescope, you can see it every time you open a new tab. You can click the title to visit NASA's website that contains an explanation of the picture as written by a professional astronomer. Clicking the picture fades everything else to black allowing you to focus in on all of the details.
If there's trouble downloading the picture, a randomly selected picture from the library of bundled images will be loaded instead. They're straight from NASA and high-resolution to boot.
"Astronomy compels the soul to look upwards and leads us from this world to another." - Plato