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View Resource Planetary Exploration in the Time of Astrobiology: Protecting Against Biological Contamination

This article discusses the history and future of planetary-protection restrictions. It begins by addressing the difficulty of discovering (possibly rare) life elsewhere, and then describes the potential difficulties of dealing with alien life that could be discovered on other worlds or in samples returned to the Earth from space. Sections include an introduction, planetary protection heritage,...

View Resource The Star Splitters: The High Energy Astronomy Observatories

This online textbook teaches the user about how a science project is conceived, funded, and managed. They do this by telling a story about how NASA's High Energy Astronomy Observatory (HEAO) Program executed a science project. By the end of this text the user learns more about our universe, galaxies, planets, and dark matter.

View Resource 2MASS Atlas Image Gallery at IPAC

The Two Micron All Sky Survey at IPAC website provides an image gallery of the solar system's objects, Jupiter's moons, H II regions, star formation regions, and reflection nebulae, open star clusters, globular star cluster, young stellar objects, planetary nebulae, supernova remnants, various IRAS sources, galaxies, as well as galaxy groups and clusters.

View Resource Planetary Gallery

In this lesson, learners examine images of the Sun, the Moon, Pluto, and all eight planets in the Solar System. Students determine the diameter of each object from a scale bar provided with each image and then rank the objects in order of size. Using a customized version of ImageJ running as an applet, students are introduced to setting scale and units of measurement.

View Resource USGS Science Topics

This topical directory provides an alternate way to browse United States Geological Survey (USGS) science programs and activities. It is not an exhaustive list of all USGS science topics but provides a categorization using a thesaurus of related terms that will give definitions, links to science content, and a structured approach to discovery. The directory is divided into fourteen major topic...

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