Editing Galileo project (section)

===Star scanner===
''Galileo''{{'s}} star scanner was a small optical telescope that provided an absolute attitude reference, but it made several scientific discoveries serendipitously. In the prime mission, it was found that the star scanner was able to detect high-energy particles as a noise signal. This data was eventually calibrated to show the particles were predominantly >{{convert|2|MeV|abbr=on|lk=on}} electrons that were trapped in the Jovian magnetic belts, and released to the Planetary Data System.<ref>{{cite web |url=http://www.mindspring.com/~feez/ |title=Science with The Galileo Star Scanner |archive-url=https://web.archive.org/web/20080719195042/http://www.mindspring.com/~feez/ |archive-date=2008-07-19 |date=July 19, 2008 |website=Mindspring.com |access-date=December 8, 2012}}</ref>

A second discovery occurred in 2000. The star scanner was observing a set of stars that included the second [[Magnitude (astronomy)|magnitude]] star [[Delta Velorum]]. At one point, this star dimmed for 8 hours below the star scanner's detection threshold. Subsequent analysis of ''Galileo'' data and work by amateur and professional astronomers showed that Delta Velorum is the brightest known [[eclipsing binary]], brighter at maximum than [[Algol]]. It has a primary period of 45 days and the dimming is just visible with the naked eye.<ref>{{cite web |title=Galileo Mystery Solved: The Star, Not The Instrument, Was On The Blink |publisher=ScienceDaily |url=https://www.sciencedaily.com/releases/2001/03/010326072946.htm |access-date=April 7, 2024 |archive-date=April 7, 2024 |archive-url=https://web.archive.org/web/20240407031918/https://www.sciencedaily.com/releases/2001/03/010326072946.htm |url-status=live }}</ref>