Keep reaching for the stars (with your DS)

Astro Arts' Hoshi Navi (Star Navi) is an interactive star chart for the DS. It features a guide to star names, sunrise and sunset times (as well as those for the moon), and an encyclopedia of astronomical phenomena. It's designed by Astro Arts, who operates the Astro Arts astronomy website and also publishes astronomy magazines in Japan. They seem to have an interest in sharing astronomy with the masses, so it makes sense that they'd be looking to the DS.

Hoshi Navi has a feature that would set it apart from other star-navigating software on the DS even if there were some: it has six-way tilt sensitivity, and allows you to look around the sky by tilting the DS. We assume you have to enter a starting location so it will start its display near you.