The planet’s apparent backward motion occurs for a few weeks about every four months. Here’s what’s really happening—and how astrology became a modern phenomenon.
What are some skywatching highlights in January 2021? Mark Earth’s closest approach to the Sun for the year, called perihelion, at the start of the month, then spot a couple of elusive planets: Uranus on Jan. 20th and Mercury throughout the second half of the month. Additional information about topics covered in this episode of What’s Up, along with still images from the video, and the video transcript, are available at https://solarsystem.nasa.gov/whats-up….
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