<p>Discovery had been scheduled to blast off at 1.36 a.m. (0536 GMT) from Kennedy Space Center in Florida to transport new equipment and experiments to the International Space Station.<br /><br />The safety risk for Discovery's seven astronauts and the shuttle was too high, NASA said.<br />The space shuttle is now scheduled to lift off Wednesday at 0510 GMT.</p>
<p>Discovery had been scheduled to blast off at 1.36 a.m. (0536 GMT) from Kennedy Space Center in Florida to transport new equipment and experiments to the International Space Station.<br /><br />The safety risk for Discovery's seven astronauts and the shuttle was too high, NASA said.<br />The space shuttle is now scheduled to lift off Wednesday at 0510 GMT.</p>
