NASA scientist Sten Odenwald calls this his "web site for the astronomically disadvantaged." Do you have lots of questions about space that you can't seem to get answers to? Would you like to learn about a career in astronomy, Big Bang cosmology, and many other in astronomy? If so, this is the place to get the answers.

Imagine 31 numbers have been organized in ascending order in a list by a computer program. Now the program has to find a number in the list, but it can only look at one number at a time. Is it easier to find the number now, than if they were in a random order?

Chandra allows astronomers to view our galaxy and beyond in ways only dreamt of before. 14 interactive flash features are offered in this exciting look at cosmic phenomena.

This video segment adapted from NOVA shows how Galileo, using his newly developed refracting telescope, observed four of Jupiter's moons, the first astronomical bodies to be discovered since ancient times.

Watch Apollo 15 astronaut David Scott perform Galileo's falling objects experiment on the Moon in this video segment from NASA. [0:47]

This set of activities teaches students about the big picture of science using Mars as an example: how to collect data, use evidence, and look at models.

A detailed chronology of all Russian and American attempts at lunar and planetary exploration. Contains links to each individual spacecraft.

This content package is a curated collection of STEM instructional resources to support the introduction and exploration of programming and robotics in grades 3-5. Resources include lesson plans, engagement activities, ebooks, digital texts, and videos.

In this video from the Science and Technology Chat series, learn about astrobiology, an interdisciplinary field that uses biology, astronomy, and geology to study the origins of life on Earth and to search for possible life on other planets. [1:37]

Windows to the Universe has developed an interactive resource about the earth, space, biological and physical sciences. Content includes information on our planet, the solar system, the universe, myths associated with space, space missions, ecology, genetics, and much more. Content can be changed from beginner to intermediate to advanced.