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NASA's Messenger probe which had been orbiting Mercury since 2011, but launched in 2004, and sending back thousands of pictures and videos, crashed into Mercury's surface sometime within the past 24 hours as it was out of fuel. It ran out of fuel a couple weeks ago but despite all efforts, it could not be saved. It hit Mercury's surface at about 8,750mph/14,082kph. Unfortunately, it impacted on the side not facing the Earth so we didn't get to see it fall out of orbit nor the crater it created. Messenger is currently the only probe that's orbited Mercury (and the only man-made object to crash there as well). It's mission was overall a success though and it accomplished a lot of things.
It also sent out this tweet yesterday
the feels
And this is the last picture it sent back to Earth before it crashed