On Makemake, a distant dwarf planet, a day lasts 22 hoursESO/L. Calçada/Nick Risinger
On Makemake, a distant dwarf planet, a day lasts 22 hoursOn a small dwarf planet called Makemake, astronomers have seen signs of surprising temperature changes. These could indicate that the tiny world, which is about 45 times further from the sun than Earth, has an active icy volcano.

Csaba Kiss at Konkoly Observatory in Hungary and his colleagues used the James Webb Space Telescope (JWST) to study Makemake for less than an hour. They observed a spike in infrared light that corresponded to a…