NEXSTAR COMPUTERISED TELESCOPE: The NexStar 4SE computerised telescope features celestron’s iconic orange tube design with updated technology and the latest features for amazing stargazing for beginners and experienced observers 4-INCH APERTURE: The four-inch primary mirror in this maksutov-cassegrain telescope for adults and kids to be used together packs enough light-gathering ability to observe the best that our solar system has to offer, while retaining a compact form factor FULLY-AUTOMATED GOTO MOUNT: Featuring a database of more than 40,000 celestial objects, the GoTo mount built into our telescopes for astronomy beginners automatically locates and tracks objects for you BONUS FREE STARRY NIGHT SOFTWARE: The NexStar 4SE Telescope includes a FREE download of one of the top consumer rated astronomy software programs for an interactive sky simulation