A star rises at 9:00 p.m. tonight. About what time will it rise one month from now?

1. A star rises about 4 minutes earlier on each successive day. 2. One month is about 30 days of that slippage. 3. Multiply 4 minutes by 30 days to get 120 minutes. 4. That is 2 hours, and the shift is always earlier, never later. 5. So 9:00 p.m. becomes about 7:00 p.m. 6. Answering 11:00 p.m. moves the rising later, which reverses the direction of the drift. 7. Answering 9:04 p.m. applies the daily 4 minutes once instead of thirty times. 8. Answering 5:00 p.m. uses two months of drift rather than one. _Source: OpenStax Astronomy (CC BY 4.0), Ch 4 "Earth, Moon, and Sky" and Ch 5 "Radiation and Spectra", section 4.3 Keeping Time_