While it's the International Space Station that tends to take all the glory, there is in fact another: China's Tiangong-1, which went into low-Earth orbit in 2011. In this amazing pictures, you can see it silhouetted against the sun.
Captured by astrophotographer Thierry Legault on June 16 in southern France, the image shows the H-shaped object between the sunspots. In fact, Shenzou-10 spacecraft is docked to Tiangong-1 right now, and each one makes up half of the H. The entire transit across the sun took less than half a second -- so Legault did an amazing job snapping the image. [Thierry Legault via Bad Astronomy]