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 an insurance contract intended to provide a guaranteed income, usually after retirement, that one cannot outlive. People most often use annuities to save money for their retirement. Many use it to create an extra retirement income.