St. Louis Science Center: Astronomy Fact Of The Day: January 9, 2022

St. Louis MO

10 January, 2022

9:31 AM

Description

Press release from St. Louis Science Center: January 09, 2022 Mercury and Venus are both considered inferior planets, which means they orbit closer to the Sun than the Earth. Due to this, both planets experience phases when viewed from Earth, just like the moon. This phenomenon was first observed by Galileo in 1610 and provided support for the heliocentric model of the solar system. This press release was produced by St. Louis Science Center. The views expressed here are the author's own.