Mercury | smithsonianmag.comhttps://www.smithsonianmag.com/rss/tag/mercury/RSS feed for MercuryenTue, 22 Sep 2026 19:12:34 +0000Mercury Has Wrinkles That Show It's Shrinking. Now, Scientists Say the Planet Has Shriveled Far More Than Previously Thoughthttps://www.smithsonianmag.com/smart-news/mercury-has-wrinkles-that-show-its-shrinking-now-scientists-say-the-planet-has-shriveled-far-more-than-we-previously-thought-180989532/A new study suggests that our solar system’s smallest planet has shrunk by up to 30 percent since its birth roughly 4.5 billion years agoTue, 22 Sep 2026 19:12:34 +0000https://www.smithsonianmag.com/smart-news/mercury-has-wrinkles-that-show-its-shrinking-now-scientists-say-the-planet-has-shriveled-far-more-than-we-previously-thought-180989532/After an Eight-Year Journey, Two Spacecraft Have Begun Their Arrival to Mercury, the Inner Solar System's Most Mysterious Planethttps://www.smithsonianmag.com/smart-news/after-an-eight-year-journey-two-spacecraft-have-begun-their-arrival-to-mercury-the-inner-solar-systems-most-mysterious-planet-180989458/The BepiColombo mission, by the European Space Agency and the Japan Aerospace Exploration Agency, is only the third to study our smallest planetary neighborFri, 04 Sep 2026 18:48:20 +0000https://www.smithsonianmag.com/smart-news/after-an-eight-year-journey-two-spacecraft-have-begun-their-arrival-to-mercury-the-inner-solar-systems-most-mysterious-planet-180989458/