The Sky Today on Monday, May 19: The variable star R Leonis

An hour after sunset, you’ll find the constellation Leo the Lion pointing head-down toward the horizon in the southwest. The brightest star in this constellation is Alpha (α) Leonis, also known as Regulus. And just over 5° west of this star is a sun called R Leonis, the first variable star identified in the Lion. Continue reading “The Sky Today on Monday, May 19: The variable star R Leonis”
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