https://www.live-feeds.com/feed/solar-system-s-smallest-planet-is-getting-even-smallerContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/solar-system-s-smallest-planet-is-getting-even-smallerhttps://www.live-feeds.com/feed/solar-system-s-smallest-planet-is-getting-even-smaller#u68304Tue, 15 Sep 2026 00:46:26 +0000Mercury is contracting more rapidly than scientists initially realized. New data indicates the solar system's smallest planet is shrinking 30% faster than previous astronomical estimates. Researchers are currently analyzing hidden clues to determine if the planet is even smaller than expected. Mercury already maintains a minimal size, measuring one-third the width of Earth and approximately 1/29th the width of Jupiter. This accelerated shrinkage suggests the planet's internal cooling or contraction process is more aggressive than prior models predicted.Why it mattersThe physical size