How to watch online this week as 2 newly discovered asteroids - 2018 CB and 2018 CC - sweep closer to Earth than the moon. You can catch one today - from Rome - starting at 20:00 UTC (2 p.m. CST; translate UTC to your time).
Terrestrial means more like Earth than Jupiter or Saturn. Water-rich means a potential for life. New insights about the 7 planets orbiting this nearby star.
Jupiter - brightest starlike object in the night sky now - will catch your eye first. Mars and the nearby star Antares are fainter, about equally bright, and both reddish in color.
View larger. | This artist's concept shows what the 7 planets orbiting TRAPPIST-1 might look like, compared to Earth. They're shown to the same scale, but not in their correct orbital relationship.