Portal:Solar System/Did you know/1

• ...that although NASA originally thought that there was only one scalloped margin dome on the planet Venus (pictured), they have since discovered hundreds of them?

• ...that the Battle of Szkłów in 1654 occurred during a solar eclipse?

• ...that NASA engineer Harvey Allen's "Blunt Body Theory" made possible the design of heat shields that protected the Mercury, Gemini and Apollo astronauts?

• ...that the Explorer 32 satellite was able to determine the density of the upper atmosphere through ground-based observations of the effect of drag on the satellite?