Live coverage of NASA’s Phoenix Mars Lander has officially begun. So far NASA’s Jet Propulsion Laboratory’s mission control looks fairly subdued, with just a few people milling about a talking to one another.

Mission controllers are wearing their Phoenix polo shirts, which are bright blue with the mission logo on the front, for the occasion.

Controllers have been working all night, said JPL Phoenix mission manager Barry Goldstein at a press briefing earlier today, adding they were tired, but excited for the big day.

Goldstein said he is starting to feel the butterflies himself, because he’s been working constantly up until the last communication with Phoenix this morning. But now that that’s done, “that means that means we have nothing to do but watch… and that means I’m a heck of a lot more tense today,” he told reporters.