Like most vegetables, cucumbers are tender and tastiest when harvested young before their seeds are fully developed. Slicing cucumber varieties are generally ready for harvest when about six to eight inches long; pickling types at three to five inches.
Headlights on âupperâ or âhighâ beam let you see about 350-400 feet ahead. 400 feet is your approximately stopping distance when driving at 50-55 mph. That is about the length of a city block. In other words, high beams let you see twice as far as low beams.
We know from experience how much light a car's headlights emits, so we can determine how far away the car is. To measure the distance to a galaxy, we try to find stars in that galaxy whose absolute light output we can measure. We can then determine how far away the galaxy is by observing the brightness of the stars.