Short-period comets need roughly 200 years or less to complete one orbit, long-period comets take more than 200 years, and single-apparition comets are not bound to the sun, on orbits that take them out of the solar system, according to NASA.
Yes, you can invest in both an IRA and a 401k (or a Roth 401k and a Roth IRA) at the same time, or any combination of those accounts. And in some cases, based on the fees in your 401k, an IRA might actually be a better place to invest your money.
A Roth 401(k) and a Roth IRA sound similar -- and they are. Contributions are made after taxes and earnings can be taken out tax-free after either five years or at age 59Â½.But the 401(k) version of the Roth has a couple of key differences from its IRA cousin.ontributions are made after taxes and earnings can be taken out tax-free after either five years or at age 59Â½. But the 401(k) version of the Roth has a couple of key differences from its IRA cousin.