Yes. When objects are in orbit around each other, there is a strong pull of gravity between them. For example, we commonly say that the Moon is in orbit around the Earth. However, the Moon pulls back on the Earth as well. This changes the Earth a little. One way we see this happening is the ocean tides.
An annuity is a long term investment that is issued by an insurance company designed to help protect you from the risk of outliving your income. Through annuitization, your purchase payments (what you contribute) are converted into periodic payments that can last for life.
An annuity is simply a series of future cash payments that occur at a regular interval. The payments can be different amounts, but must occur regularly - usually monthly, quarterly, or annually. Everyday examples of annuities include: Mortgage payments ; Life insurance payments ; Pension payments ; Regular savings account deposits ; Some investments ; The value of an annuity can be determined with the help of a concept called the time value of money which states that money loses its value over time.