SPACE — When Mercury is in retrograde, it appears as if the planet is moving backwards when viewed from Earth's sky.<br /><br />This is because Mercury completes an orbit faster than Earth does, according to reports from NASA.<br /><br />According to Vox, as Mercury passes Earth, Earth's line of sight will shift so that Mercury will appear to retrograde for around three weeks when viewed from our planet.<br /><br />This is because both Mercury and Earth are orbiting the solar system at different speeds at the same time, creating an illusion that the planet is moving backwards.<br /><br />Mercury is currently retrograding from March 5 to March 28 and will retrograde two more times later this year, according to Newsweek.<br /><br />Dr. Mark Hammergren, an astronomer at Adler Planetarium, told Mental Floss that there is zero evidence that a planet retrograding is something we should worry about.
