Stellarium

Finally, Hal decides to expand on Tomar-Re’s original plan: he gathers passing stellarium and fashions them into rods.

It’s a moving target, both from day to day and from hour to hour, so I recommend finding the position of the comet in the sky using the free Stellarium web planetarium software, entering the time of night and location you’d like to observe from.

There’s also Stellarium, a great planetarium/star map software for your smartphone, laptop, computer, or tablet.

Humans travel to Mars in a spaceship named Stellarium, and meet two competing races on the planet.