After three postponed launches, a satellite built by students at St Thomas More Cathedral School in the Diocese of Arlington, Virginia, was finally launched into space on December 6. The CubeSat satellite -- a four-cubic-inch package that weighs less than three pounds and is packed with a payload of scientific experiments -- is destined for the International Space Station where astronauts will deploy it into orbit in late January. On December 3, hundreds of St Thomas More students, parents and teachers filled a conference room at the Boeing Building in the Crystal City section of Arlington County to watch the launch on large TV monitors hanging on the walls. The screens showed the United Launch Alliance V 401 rocket ready to go, and students and parents were excited. "It's good for the school. It's a once in a lifetime thing," said parent Michelle Potter told the Arlington Catholic Herald, the diocesan newspaper. But there was a problem -- a problem not uncommon for launches. Liftoff was scheduled for 6.03pm local time. But around 5pm, there was an announcement that the launch might not happen. Weather, especially strong winds, gave the launch only a 30 percent chance of happening. There was a 30-minute window for any launch to occur, but at 6.25pm the launch was postponed. They would try again the next evening. The December 4 launch also was postponed because of weather as was the next day's attempt. Finally, at 4.44pm on December 6, the rocket successfully took off from Cape Canaveral, Florida. The children and their parents took the delays in their stride. "It's kind of what I expected," said fifth-grader James Pohl. "There was a 70 per cent chance it wouldn't go." Science experiment payloads created by students and launched into space are not uncommon. But those experiments usually are built by university graduate students. According to NASA, this is the first time a US grade school built a CubeSat. The satellite is named St Thomas More Cathedral School Satellite-1 or STMSat-1. The project began in April 2012, when Joe Pelligrino, the father of a student and a NASA Goddard engineer, saw the St Thomas More students form the image of the space shuttle in the parking lot of the school when the Discovery shuttle flew piggy-back over Arlington on a modified 747 from Florida to its final home at the Smithsonian's Steven F Udvar-Hazy Centre in Chantilly. About 400 students had a hand in designing, building, testing and launching the satellite. Every class from pre-K to eighth-grade was involved. Every student had a job with a job description. The main payload component is a small camera that will take a photograph every 30 seconds and transmit the images to earth stations that will be shared by schools around the world. The satellite also will measure temperature in space. NASA provided the school with a special antenna to track the satellite. There were some objects aboard that are not usually included in rocket launches -- a Pope Francis medal blessed by the Pope and donated by Sister Bernadette McManigal, diocesan superintendent of schools; a crucifix blessed by Fr Robert Rippy, rector of the Cathedral of St Thomas More; and a small metal container that holds personal items from a family who made a large donation to the satellite project. "I'm just so excited for all the students, teachers and parents (who) supported this mission," said Nelda Thomas, assistant principal. "This wouldn't have happened without the support of our community." Thomas said that the photographs and measurements taken by the St Thomas More CubeSat will benefit scientists and students around the world. There was another reason for her enthusiasm about the launch. "I'm excited that we had a religious payload," Thomas added.