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CAPE CANAVERAL, Florida (CNN) -- The Space Shuttle Discovery launch was scrubbed early Tuesday because of bad weather, NASA said he mission to the International Space Station was postponed until 1:10 a.m. ET Wednesday, NASA said.

"Basically, you go when the time is right," astronaut Cady Coleman told CNN. "And a space station mission has to go at a certain time. You have a window of time in order to catch up with the space station."

Commander Rick Sturckow and Pilot Kevin Ford are to guide Discovery to the space station.

One of Discovery's seven astronauts, Nicole Stott, is to remain on the space station as a flight engineer, replacing astronaut Timothy Kopra, who is to return home aboard Discovery as a mission specialist, according to the NASA Web page for the mission.

Also on board: The Leonardo logistics module, science experiments and the Combined Operational Load Bearing External Resistance Treadmill (COLBERT), named for fake newsman Stephen Colbert of Comedy Central's "The Colbert Report."

Colbert won an online poll conducted by NASA to name the newest space space station compartment, but Colbert and the space agency compromised to give the moniker to the treadmill. The new compartment was given the name Tranquility.

"I'm so proud my treadmill will be going into space to help trim down those famously fat astronauts. Lay off the Tang, Chubby!" Colbert said in a statement last week.

The mission will be Discovery's 37th to space, and the 30th shuttle mission dedicated to International Space Station assembly and maintenance, NASA says.

NASA plans to retire the the space shuttle fleet at the end of 2010 and wouldn't be able to send crews to the space station for at least several years after that. In the meantime, U.S. astronauts will have to hitch rides to the International Space Station aboard Russian Soyuz spacecraft.