Space feed
~600 km
Olympus Mons on Mars is a shield volcano roughly 600 kilometers across. Its enormous footprint reflects repeated lava flows that spread outward rather than building only a narrow, steep cone.
243 days
Venus takes about 243 Earth days to rotate relative to the stars, longer than its 225-day year. Its solar day, measured from one sunrise to the next, is shorter: about 117 Earth days.
1B tons
A teaspoon-sized volume at neutron-star densities can have a mass of roughly a billion tons. This is a density comparison, not a suggestion that stable spoonfuls could be brought to Earth.