NASA's New Horizons spacecraft has sent back the first in a series of the sharpest views of Pluto it obtained during its July flyby – and the best close-ups of Pluto that humans may see for decades.

It probably comes as no surprise that the New Horizons mission to Pluto takes the top spot in Science News’ list of 2015’s most important stories. Since New Horizons awoke last December, we’ve devoted ...

For the first time since its discovery in 1920, Pluto is entering the outer solar system—a journey that’s slowly thinning out its atmosphere. Reading time 3 minutes Pluto’s orbit around the Sun is a ...