9.Pluto- 39.4 AU why do astronomers not measure the distances to stars in kilometers? distance to stars are so great that the number are too large to work with easily.
Some seeds can last for three to four years, such as: 1  asparagus. 2  beans. 3  broccoli. 4  carrots. 5  celery. 6  leeks. 7  peas. 8  spinach.
They are easy to grow, and can be harvested over a long period of time. These seeds keep about four or five years. Our Butternut Squash and Sugar Pumpkins are available in paper packets. They should last six years in cool dry conditions.