Mercury is the closest planet to the Sun, whipping around our star every 88 days compared to Earth’s 365.25 days. Mercury will also be the first planet destroyed when the Sun expands on its way to becoming a red giant in about 5 billion years.
So it seems a bit rough that we blame Mercury for all our problems three to four times a year when it’s in retrograde. But what does it mean when we say Mercury is “in retrograde”?
