Hold the Moon in your hands. Moon Globe turns your iPhone, iPod Touch or iPad into a precision instrument for viewing Earth's Moon. Satellite imagery and topographic laser altimeter data are combined to render the Moon with realistic lighting in realtime 3D. Free Apple
Take a tour of the mysterious Red Planet. This virtual globe combines a high-resolution satellite map with laser altimeter data and advanced topographic lighting to present the planet Mars as it appears from above. An Introduction and Guided Tour present some of Mars' most intriguing features. Free Apple
This app gives you in-depth information on all the planets. Locate planets in 2D or 3D mode and select different visibilities of the sky, such as X-ray, Infrared, Microwave and Radio. There is also a Globe function that lets you view a rotating 3D image of all the planets and the moon. Free Apple
Fully online courses with video lectures, exercises, quizzes and online readings in things like Relativity, Classical Mechanics, Electricity and Magnetism, etc. that can be freely reused by instructors and reviewed by students.
Published by Rice University's OpenStax, this free College Physics textbook can be read online, in PDF, or on an iPad. It's peer reviewed, available for reuse in the classroom and customizable by instructors.
The Astronomy Image Explorer (AIE) is a tool for researchers working in the fields of Astronomy and Astrophysics to gain access to images published in peer-reviewed journals. AIE is populated with hundreds of thousands of images published in the journals of the American Astronomical Society.
Build the elements of the periodic table by adding and subtracting the atomic building blocks of neutrons, protons and electrons with the swipe of your finger. An exciting, energetic and informative app. Free (first half of the periodic table); Cost (second half) Apple