Two potentially life-friendly planets found orbiting a nearby star

The team calculates that one of the planets, called Teegarden’s star b, completed an orbit in a mere 4.9 Earth-days; the other world, Teegarden’s star c, has an orbit of just 11.4 days. Before they could report that those planets likely exist, the team had to rule out intrinsic stellar phenomena, like star spots and flares, that can masquerade as orbiting worlds. First, scientists don’t know the exact time it takes for Teegarden’s star to rotate on its axis, and that type of motion could be masquerading as one of the planet signals.

Source: www.nationalgeographic.com