astronomy Later this month, look up to see Jupiter and Saturn appear closer together than they've been since the Middle Ages David Pescovitz
asteroid Asteroid samples escaping from overstuffed NASA probe Osiris-Rex that grabbed lots of Bennu rubble Xeni Jardin
billions and billions Watch a young Carl Sagan's first TV documentary, "The Violent Universe" (1969) David Pescovitz
galactic immigrants An asteroid will come close to hitting the Earth the day before Election Day Thom Dunn
Extraterrestrials NASA delivers first grant in 30 years to support the search for extraterrestrial intelligence David Pescovitz
