A well-studied binary system called Alpha Draconis exhibits primary and secondary eclipses, according to an analysis of data from NASA’s Transiting Exoplanet Survey Satellite (TESS). Alpha Draconis (circled). Image credit: NASA / MIT / TESS. Alpha Draconis, also known as Thuban, HR 5291, HD 123299, and HIP 68756, is located about 270 light-years away in the northern constellation of Draco. “Despite its ‘alpha’ designation, it shines as Draco’s...
