Forty-nine years ago this Friday, Neil Armstrong and Buzz Aldrin became the first humans to set foot on the Moon. That day, they also became the first people to harvest samples from another celestial body and bring them back to Earth.
Data collected by NASA's Juno spacecraft using its Jovian InfraRed Auroral Mapper (JIRAM) instrument point to a new heat source close to the south pole of Io that could indicate a previously undiscovered volcano on the small moon of Jupiter.
The study of exoplanets — planets that lie outside our solar system — could help scientists answer big questions about our place in the universe, and whether life exists beyond Earth. But, these distant worlds are extremely faint and difficult to image directly.