Some of the most spectacular photos on the site are taken by the Hubble Space Telescope. They include images of galaxies far beyond ours, the aftermath of a massive star's death, the world's first view of the Earth from the moon, "Earthrise" from Apollo 8, the first groups of astronauts, including the original Mercury Seven astronauts.
NSDL was created by the National Science Foundation to provide organized access to high quality resources and tools that support innovations in teaching and learning at all levels of science, technology, engineering, and mathematics (STEM) education.
Educators can use the PSRC to find curriculum materials for all grade levels, classroom demonstrations, labs, online learning material, evaluation instruments, and articles about approaches to science education.
A branch of knowledge that applies the principles of physics and chemistry and the methods of mathematical analysis and computer modeling to understand how biological systems work.
An overview of the history, mythology, and current scientific knowledge of each of the planets and moons in our solar system. Each page has text and images, some have sounds and movies, most provide references to additional related information.