... Live: Watching for Venus to Cross the Sun . ... One way to follow this rare event is to actively reload the above live image of the Sun during the right time interval and look for an unusual circular dark dot. ... The circular dot is the planet Venus. Milky Way Galaxy Doomed: Collision with Andromeda Pending . ... Looking Back at an Eclipsed Earth . ... What's that dark spot on planet Earth? ... The above image of Earth was taken last week by MTSAT during an annular eclipse of the Sun. ...