Are you out there, Planet X? Next-generation telescopes are mapping this outer frontier. Credit: NASA/SOFIA/Lynette Cook Out beyond the orbit […]
Tag: Pluto
We saw the heart of Pluto 10 years ago—it’ll be a long wait to see the rest
A 50-year wait for a second mission wouldn’t be surprising. Just ask Uranus and Neptune. Four images from New Horizons’ […]