Observations made of Jupiter’s moon Io during the Juno mission’s flybys helped astronomers confirm how and why Io became the most volcanic world in the solar system.
If we weren’t dazzled by Jupiter’s own glare, these moons are bright enough to be seen ... Perseus (which appears as a constellation in our skies tonight). In reality, poor Io would be ...
Mars has now risen to the rank of the fifth brightest object in the pre-midnight evening sky, rivaled only by the moon, Venus, Jupiter and the brightest of all stars, Sirius.