tips news that William Shatner and Wil Wheaton have each narrated a NASA video titled "Grand Entrance,"
which documents the upcoming descent and landing of Mars rover Curiosity onto the Red planet. Curiosity is the nickname for the Mars Science Laboratory
, the largest rover ever sent to another world. It is scheduled to land on Mars on August 5 at 10:31PM PDT (August 6 at 05:31 UTC), and the event will be broadcast live on NASA TV. The landing process documented in the video will take about 7 minutes, and it has to go perfectly all on its own — the time delay caused by the 154-million-mile distance to Earth means that signals will take 14 minutes to even reach us. For further details, check out Wil's video
. NASA's fact sheet
(PDF) has more information as well.