Mission scientists have found Pluto to be 1,473 miles (2,370 kilometers) in diameter, somewhat larger than many prior estimates. Images acquired with the Long Range Reconnaissance Imager (LORRI) were ...

NASA's New Horizons mission has answered one of the most basic questions about Pluto -- its size. Mission scientists have found Pluto to be 1,473 miles (2,370 kilometers) in diameter, somewhat larger ...

This composite image shows color views of Pluto (right) and its largest moon Charon as they appeared on July 11, 2015 to NASA's New Horizons spacecraft ahead of a historic flyby on July 14.

Update, July 13, 3015 at 20:00 UTC: Emily Lakdawalla has also written about this on her blog, with more details. Update 2, July 13, 2015 at 20:30 UTC: There has been some confusion about the ...

New Horizons provides unprecedented details of Pluto's moon, Charon, as presented in a NASA press conference on July 15, 2015, at the Johns Hopkins University Applied Physics Laboratory, Laurel, ...

The discovery of a nearly Pluto-sized object way out beyond the known worlds could jeopardize the status of Pluto as a planet, adding fresh fuel to an argument among astronomers that is likely to last ...

After nearly ten years and just over 3 billion miles, NASA's probe New Horizons flew by Pluto at 30,800 miles per hour and used seven scientific instruments to gather so much data it will take 16 ...

LAUREL, Md. — With less than a day to go before NASA's New Horizons mission zooms past Pluto, scientists reported on Monday that the dwarf planet isn't quite as dwarfish as they thought — in fact, ...