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.
The differences between 401k and Roth IRA are subtle, and often people have trouble deciding between the two. The major difference between the two lies in the manner the earnings are taxed. This is not significant if you have got a 401k plan where the employer makes a matching contribution.In Roth IRA, it is your money alone that goes into the fund, and is attractive as you get tax free earnings after retirement.he major difference between the two lies in the manner the earnings are taxed. This is not significant if you have got a 401k plan where the employer makes a matching contribution. In Roth IRA, it is your money alone that goes into the fund, and is attractive as you get tax free earnings after retirement.