Spacecraft Messenger orbits planet Mercury

This video from the USA is called NASA‘S MESSENGER Spacecraft Begins Historic Orbit of Mercury.

The spacecraft Messenger successful entered an orbital path around the planet Mercury March 17, making it the first to take up a long-term station around the innermost planet of the solar system. The spacecraft fired its main thruster for 14 minutes, slowing its rush towards the Sun sufficiently for it to be captured by the weak gravity of Mercury, the smallest planet: here.

First Image Ever Obtained from Mercury Orbit: here. See also here. And here.

Dark matter could provide heat for starless planets: here.