The American space agency, NASA says it has again made contact with a spacecraft studying the sun and space weather. NASA said it lost contact with the Solar Terrestrial Relations Observatories, also known as the STEREO-B spacecraft, two years ago. Communications with the spacecraft were lost after NASA attempted to try to prevent overheating of the spaceship’s antenna. The space agency said contact with STEREO-B was restored last week. NASA has another spacecraft that is nearly identical to STEREO-B called STEREO-A. It also was launched in 2006 to study the sun and space weather. STEREO-A is working normally. NASA said it will now test STEREO-B to see if the spacecraft’s instruments and sensors are operating correctly.