This new image of an area on Pluto’s largest moon Charon has a captivating feature — a depression with a peak in the middle, shown here in the upper left corner of the inset. The image shows an area approximately 240 miles (390 kilometres) from top to bottom, including few visible craters. The image was taken at approximately 10:30 UTC (11:30am BST) on 14 July 2015, about 1.5 hours before closest approach to Pluto, from a range of 49,000 miles (79,000 kilometres). Image credits: NASA-JHUAPL-SwRI.This image gives a preview of what the surface of this large moon will look like in future close-ups from NASA’s New Horizons spacecraft. This image is heavily compressed; sharper versions are anticipated when the full-fidelity data from New Horizons’ Long Range Reconnaissance Imager (LORRI) are returned to Earth.
The rectangle superimposed on the global view of Charon shows the approximate location of this close-up view.
The image was taken at approximately 6:30am EDT on 14 July 2015, about 1.5 hours before closest approach to Pluto, from a range of 49,000 miles (79,000 kilometres).
The true size of Pluto has been debated since its discovery over 85 years ago. New Horizons’ mission scientists can now answer that question with certainty, confirming that Pluto is larger than all other known Solar System objects beyond the orbit of Neptune.
NASA’s Hubble Space Telescope has spotted a small, dark moon orbiting Makemake, the second brightest icy dwarf planet — after Pluto — in the Kuiper Belt. The moon, provisionally designated S/2015 (136472) 1 and nicknamed MK 2, is estimated to be 100 miles in diameter. Makemake and its moon are more than 50 times farther away than Earth is from the Sun.
The first images from the New Horizons spacecraft since late July will come back to Earth on 5 September, and scientists are salivating over what the new pictures will reveal about Pluto.