来自MSN2 个月
An Earth-like planet could be hiding at the edge of our solar system
Some researchers now propose that these irregularities could indicate the presence of an undiscovered Earth-like planet. The Kuiper Belt extends from approximately 50 astronomical units (AU ...
来自MSN15 天
Potential future human worlds? Earth-like planets found circling 2nd-closest star system to us
A quartet of Earth-like worlds, each approximately 20% to 30% the size of our planet, orbits one of our closest stellar neighbors, according to a new study. These rocky alien worlds are close ...