Part 2 of Duncan Lunan’s series looking at Solstice and equinoxes – the Moon and planets
“The four large Jupiter moons, discovered by Galileo and called the Galilean satellites in his memory, are Io, Europa, Ganymede and Callisto, in order out from the planet.”
Jupiter is much further from the Sun than Mars and is passed by the Earth every 13 months, so it’s brilliant in the night sky for much of every year.
“In some circles, only unmanned exploration of Mars would be considered acceptable”
In the last of his series on Mars, Duncan Lunan looks at the possibility of life on the planet
“The two moons of Mars were discovered in 1877 by Asaph Hall. The largest crater on Phobos, the inner moon, is named ‘Stickney’, the maiden name of Asaph Hall’s wife, who encouraged him to keep looking when he was ready to give up. “
“When Mariner 9 approached Mars in 1971, to become the first probe to orbit the planet, Mars was at its closest to the Sun and in the grip of a dust storm more severe than any we’ve seen since”
Polygonal blocks or ‘campuses’ on the lowland surface of Venus. Note the zones of ridges that roughly parallel ‘campus’ margins. Credit: Paul K. Byrne, North Carolina State University and Sean C. Solomon, Lamont-Doherty Earth Observatory
Find out more about the planet Mercury from our guide by Duncan Lunan
Venus is an enigma. It’s the planet next door and yet reveals little about itself.