The Orion Nebula As You've Never Seen It

It has been called a stellar nursery, and it has never been so spectacular. Astronomer Massimo Robberto is our guide to a new, billion-pixel image of the Orion Nebula that you can explore on the Web. Emily Lakdawalla presents an encore Q&A segment about taking movies from rockets hurtling skyward, and Bruce Betts has another Explorer's Guide to Mars poster to give away in the space trivia contest.