Early Collisions May Have Caused The Realignment Of Uranus

As­tro­no­mers say they may have fig­ured out why the plan­et Ura­nus seems to be ly­ing on its side with re­spect to the Sun. A se­ries of bumps from oth­er so­lar sys­tem ob­jects early in its life could ex­plain the odd align­ment, they pro­pose.