Star Walk 2 ($2.99) is an interactive augmented reality stargazing app that lets users explore what they are seeing in a 3D simulation.
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Pro Displays different parts of the light spectrum
Instead of only displaying what would be visible to the human eye, Star Walk displays gamma ray, x ray, h-alpha, infrared, microwave, and radio.
Pro 3D view of stars up close
Just tap on a star and see what it looks like from a closer perspective.
Pro Identifies satellites
For 99 cents, satellites can be tapped for identification. This app contains information on over 9000 satellites.
Pro Users can choose which objects are displayed
Users can toggle which features are activated, such as constellation description or satellite display.
Pro Contains information about all the planets
Star Walk 2 attempts to give users a comprehensive view of all the things that are currently happening in space, this includes events at other planets. For instance, it displays the angle of rotation around the sun, sunrise, sunset, and length of day on that particular planet.
Pro Adds illustrations over feed from camera
Instead of just displaying a feed of what the sky should look like when the device is aimed in different directions, Sky Walk paints stars, constellations, and satellites over real time images taken from the device's camera.
Con Unstable for many users
Many people who have this app complain that it crashes within seconds of starting.