Portal:Solar System/Did you know/10

• ...that the Tolstoj crater, a 400-km (240 mile) wide impact crater on the planet Mercury has an extensive, and remarkably well-preserved, radially-lineated ejecta blanket?

• ...that Malin Space Science Systems operates the camera on the Mars Global Surveyor?

• ...that Abbott Lawrence Rotch established the Blue Hill Meteorological Observatory in 1885, which maintains the longest-running meteorological record of any observation site in the United States?

• ...that the asteroid 7796 Járacimrman, discovered in 1996 on Kleť Observatory and named after the famous fictitious Czech genius Jára Cimrman, proved to be the lost asteroid that had already been observed in 1973 on Brera-Merate Observatory in northern Italy?