Comet SWAN25F, a newly spotted celestial visitor, races toward a fiery encounter with the Sun. Catch its green glow near Andromeda before it possibly vanishes forever!

A trail from Alice Springs takes hikers through a baking landscape of mountains, pools, plants and trees that inspired an Aboriginal artist.

For hours already, the hikers have been trudging uphill, above them a fantastically starry night sky ... this very Australian pilgrimage, the 230-kilometre Larapinta Trail from the desert city ...