Space feed
100 km
Yes. A common definition puts the edge of space at the Kármán line, 100 kilometers above sea level. Some organisations, including the US Air Force and NASA for astronaut wings, use about 80 kilometers instead.
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.