Hi Cassandra, If you were
Hi Cassandra, If you were looking toward the west-southwest, you may have seen the planet Venus as it was slowly setting. However, no planet or star would suddenly change speed as you describe. My guess is that you saw Venus and that by coincidence, an aircraft flew into the same part of the sky just as Venus was setting. This could make it seem that Venus itself had suddenly changed speed. Regards, Jeff DeTray