Robert Lea is a science journalist in the U.K. who specializes in science, space, physics, astronomy, astrophysics, cosmology, quantum mechanics and technology. Rob's articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space and ZME Science.
The European Space Agency's dark universe detective, the Euclid spacecraft, is on track after locating its guiding stars, which it lost as a result of cosmic misidentification.
The cause of this issue was cosmic rays — charged particles that the sun emits during periods of high solar activity. The cosmic rays were impacting the Fine Guidance Sensor, creating signals that Euclid was incorrectly identifying as stars. In addition, stray light from the sun and solar X-rays were interfering with the spacecraft.
The mission team created a software patch that was first applied to an electric model of Euclid here on Earth before being tested on the real thing at Lagrange point 2, which is around 1 million miles from home, ESA officials said in a statement. After being updated and undergoing 10 days of testing in orbit, the Fine Guidance Sensor is working as intended, and Euclid's guide stars have once again been located.
"The performance verification phase that was interrupted in August has now fully restarted, and all the observations are carried out correctly," Giuseppe Racca, Euclid project manager, said in the statement."This phase will last until late November, but we are confident that the mission performance will prove to be outstanding and the regular scientific survey observations can start thereafter.
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