article_snippet.sent: Esa’s Rosetta spacecraft uses two star trackers to work out where Esa’s Rosetta spacecraft is in space, in addition to a sun sensor, navigation cameras and three laser gyroscopes.
article_snippet.sent: Crucially, two star trackers allow Rosetta to know where it is with respect to the sun and Earth, so Esa’s Rosetta spacecraft can correctly orient Esa’s Rosetta spacecraft antenna to send and receive signals from ground stations on our planet.
article_snippet.sent: the spacecraft uses two star trackers (shown in red) to work out where the spacecraft is in space, in addition to a sun sensor, navigation cameras and three laser gyroscopes.
article_snippet.sent: two star trackers (shown in red) allow Rosetta to know where it is with respect to Earth, so it can send and receive signals.