Il cielo sopra di noi: Viaggio attraverso il cielo stellato ad occhio nudo e con il telescopio

Il mio primo libro, una guida completa sull’osservazione del cielo ad occhio nudo e con il telescopio. Imparerete le nozioni base di astronomia, come orientarvi nel cielo stellato, a riconoscere le costellazioni, a usare il telescopio e molto altro ancora.

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Ganymede from Juno

14/06/2021

What does the largest moon in the Solar System look like? Jupiter's moon Ganymede, larger than even Mercury and Pluto, has an icy surface speckled with bright young craters overlying a mixture of older, darker, more cratered terrain laced with grooves and ridges. The cause of the grooved terrain remains a topic of research, with a leading hypothesis relating it to shifting ice plates. Ganymede is thought to have an ocean layer that contains more water than Earth -- and might contain life. Like Earth's Moon, Ganymede keeps the same face towards its central planet, in this case Jupiter. The featured image was captured last week by NASA's robotic Juno spacecraft as it passed only about 1000 kilometers above the immense moon. The close pass reduced Juno's orbital period around Jupiter from 53 days to 43 days. Juno continues to study the giant planet's high gravity, unusual magnetic field, and complex cloud structures. Last week's solar eclipse: Notable images submitted to APOD