For newborn planets, solar systems are naturally baby-proof Kit Daniels Posted on October 10, 2019 Posted in Aggregated No Comments Our own solar system could also have harbored an earth-like planet closer to the sun than the current innermost planet, Mercury Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email