NASA is attempting something it has never done before: rescuing a space telescope that's slowly falling toward Earth.
The Swift Space Telescope has spent more than 20 years helping scientists study some of the universe's most powerful explosions. It originally orbited about 600 kilometers (over 300 miles) above Earth. At that height, the atmosphere is normally very thin — but increased solar activity has been pushing more of the atmosphere outward, creating extra drag. That drag slowed Swift down and caused its orbit to drop to about 360 kilometers (a little over 225 miles) above Earth.
To save it, NASA launched a rocket carrying a fridge-sized robot called Link. Link will first take pictures of Swift to figure out the safest place to grab hold of it. Then, using three robotic arms and its thrusters, it will slowly push Swift back up into a higher orbit. The whole process could take several months.
The mission is risky, since NASA has never attempted a rescue like this before. But if it works, Swift could keep operating for another decade. A success could also give NASA a blueprint for rescuing other aging spacecraft in the future — including the Hubble Space Telescope.
NASA is attempting something it has never done before: rescuing a space telescope that's slowly falling toward Earth.
The Swift Space Telescope has spent more than 20 years helping scientists study some of the universe's most powerful explosions. It originally orbited about 600 kilometers (over 300 miles) above Earth. At that height, the atmosphere is normally very thin — but increased solar activity has been pushing more of the atmosphere outward, creating extra drag. That drag slowed Swift down and caused its orbit to drop to about 360 kilometers (a little over 225 miles) above Earth.
To save it, NASA launched a rocket carrying a fridge-sized robot called Link. Link will first take pictures of Swift to figure out the safest place to grab hold of it. Then, using three robotic arms and its thrusters, it will slowly push Swift back up into a higher orbit. The whole process could take several months.
The mission is risky, since NASA has never attempted a rescue like this before. But if it works, Swift could keep operating for another decade. A success could also give NASA a blueprint for rescuing other aging spacecraft in the future — including the Hubble Space Telescope.