NASA has discovered an Earth-sized planet that is considered "habitable." On Tuesday, at the 241st meeting of the American Astronomical Society in Seattle, Washington, it presented the finding. According to postdoctoral fellow at NASA’s Jet Propulsion Laboratory in Southern California Emily Gilbert, “This is one of only a few systems with multiple, small, habitable-zone planets that we know of.” “That makes the TOI 700 system an exciting prospect for additional follow up. Planet e is about 10% smaller than planet d, so the system also shows how additional TESS observations help us find smaller and smaller worlds,” she explained. The...