NASA announced today that the test vehicle is slated to take off some time between 8 a.m. and noon tomorrow from Kennedy Space Center's Launch Pad 39B. The space agency noted that Ares I-X rocket is the first non-space shuttle craft to be launched from the Pad 39B since the Apollo program's Saturn rockets were retired more than 25 years ago.

"For those of us who've lived with the shuttle and grew up looking at Saturn Vs, it's obviously a little different than what we're used to seeing," said Jon Cowart, one NASA's two Ares I-X deputy mission managers, in a statement.

Bad weather could stand in the way of the big test launch, though, as meterologists say that there's only a 40% change of good weather in the four-hour window. If the 1.8-million-pound, 327-foot-tall rocket doesn't launch on Tuesday, the take-off will be rescheduled for Wednesday, according to NASA.

The space agency noted on its Web site that it's looking for tomorrow's flight to gauge the dependability and characteristics of the rocket's hardware, facilities and ground operations. With more than 700 sensors on board, Ares I-X is wired to relay ascent data back to engineers on the ground.

The Ares I-X combines technology from several different operations.