An unmanned spacecraft blasted off Thursday on a yearlong journey to Mars, beginning one of China’s most ambitious space missions to date.The Tianwen-1 lifted off from the Wenchang Spacecraft Launch site on China’s southern Hainan Island aboard a Long March 5 rocket as hundreds of cheering fans gathered on beaches across the bay to witness the event.The Tianwen-1, which translates into “Heavenly Questions” or “Questions to Heaven,” is expected to reach the Red Planet by February.  Once it enters orbit, a landing probe will detach and land on the planet’s Utopia Planitia region, where it will release a small solar-powered rover that will explore the surface for at least three months.A successful landing would make China only the second nation to place a spacecraft on the Martian surface, with the United States having landed eight probes since 1976.  China would also be the first to achieve all three phases — orbiting, landing and deploying a rover — in the same mission.This is China’s first independent mission to Mars. A 2011 attempt failed when a Russian rocket carrying a Chinese orbiter malfunctioned after launch, and was unable to escape Earth orbit.The Tianwen-1 mission is the most ambitious undertaking of China’s rapidly evolving space program.  Only the U.S. and Russia have successfully launched their own astronauts into orbit and successfully achieved a “soft” landing of a spacecraft on the lunar surface.Last year, though, China’s Chang’e-4 spacecraft became the first to make a soft landing on the far side of the moon.The Tianwen-1 is the third mission to Mars this year.  A Japanese rocket blasted off Monday carrying an orbiter developed and built by the United Arab Emirates. The U.S. space agency NASA is scheduled to launch a new Martian rover, dubbed Perseverance, July 30. 
…