OK, it's a manufactured holiday, blah blah blah. That doesn't mean we can't have fun with it! If you have someone you love who also shares your love of the sky, then have I got the pictures for you. I already linked to scientist valentines cards, and the one I made on my own. But what about real astronomical objects? Turns out there are quite a few. Let's start close to home... astronomically speaking. You may already know about the famous Mars Valentine Crater:
But did you know about the Valentine Mars mesa?
The asteroid Eros was visited by the NEAR spacecraft, which took the picture below. Eros isn't heart-shaped (it's spud-shaped), so why include it? Well, don't you know your mythology?
Heading outward into the Universe, we can find IC 805... also called the Heart Nebula, taken by the gifted astrophotographer John Chumack and posted on BAUT:
And finally, ...