At least in their Google Sky Map application that is. Google is reporting on their mobile blog that they have now added a time travel feature to their star gazing app. A quote from the Google post:
Have you ever wondered how the sky was back in 1900? How the sky looked when the Apollo 11 moon landing happened? Or what the sky will look like next Thursday night for your planned star-gazing trip?
Today, the new version of Google Sky Map lets you time travel to see the sky at a specific date, past or future. After smooth travel to the desired year, you can fast forward or rewind in various speeds and watch how the sky changes.