Tag: orbital eccentricity

• December’s Morning Mercury: The Smallest Planet’s Greatest Elongations

  Today, we are going to be looking at the planet Mercury. We’re going to start just a couple of days ago, when Mercury was at its greatest elongation. We’re coming back to sunrise on the 7th of December, when Mercury reached its greatest elongation. Thankfully, it will be close to this greatest elongation for a…

  Caoimhín de Bhailís

  December 9, 2025

  Astronomy, Astronomy Video

  Astronomy, elongation, mercury, mercury’s greatest elongation, mercury’s greatest western elongation, orbit, orbital eccentricity, planets, science, space, stargazing, video