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.
Do seeds have an expiration date? A: It depends on the type of seeds and how they were stored. If your seeds were kept in a cool, dry place, there's a good chance they're still viable, but expect a lower germination rate â exactly how low depends on the species. Seed corn is best used the current year (after that germination is greatly reduced), but tomato seeds can last for more than four years if stored well.