The distance between the two stars that are separated by only 360 astronomical units is extremely close for twin stars with planets orbiting them, scientists said. (ibtimes.com)
A young star with planets forming, illustrated here, may retain chemical clues about the worlds that surround it. (discovermagazine.com)
Two are astronomical: the fraction of stars with planets and the mean number of habitable planets per star. (scientificamerican.com)