A NASA space observatory is at risk of falling to Earth due to atmospheric drag. The Neil Gehrels Swift Observatory has been in low-Earth orbit for nearly 22 years, serving as a key tool for astrophysics research. The observatory's altitude is critical, and if it falls below a certain point, it will reenter the Earth's atmosphere.

NASA has predicted this could happen as early as this fall if no action is taken. Further details about the mission to rescue the observatory and its current status are available from the source, including information about the challenges encountered during the rescue effort.