Astronomy: Websites

General Websites 

• Center for Astrophysics (Harvard & Smithsonian): A collaboration between Harvard and Smithsonian designed to ask — and ultimately answer — humanity’s greatest unresolved questions about the nature of the universe.
• Department of Energy Data Explorer: DOE Data Explorer (DDE) is the Office of Scientific and Technical Information (OSTI) search tool for finding DOE-funded, publicly available, scientific data records submitted by data centers, repositories, and other organizations funded by the Department.
• Science.gov: An official website of the U.S. government providing ready access to the massive stores of federally funded scientific research results, without needing to know which agency funded the research.
• Space Telescope Science Institute (STSI): The Space Telescope Science Institute in Baltimore,  operated by the Association of Universities for Research in Astronomy. We help humanity explore the universe with advanced space telescopes and ever-growing data archives.
• TED Talks: Astronomy: A collection of TED Talks on the topic of astronomy. 

• NASA (.gov)
• A to Z NASA Missions 
• Asteroid Watch
• Astrophysics Data Centers: NASA's reference list of data centers around the word. 
• Dark Matter & Dark Energy: Discover the universe’s building blocks – matter, dark matter, and dark energy.
• Educational Resources and Events 
• Discover the Universe: Learn about the history of the cosmos, what it’s made of, and so much more. 
• NASA's Eyes: A suite of 3D visualization applications that allows everyone to explore and understand real NASA data and imagery in a fun and interactive way.
• NASA Technology: NASA technology development supports the nation’s innovation economy by creating solutions for space exploration that also generate tangible benefits for life on Earth. NASA is investing in the future of innovation.
• Open Science: Open-source science is a commitment to the open sharing of software, data, and knowledge (algorithms, papers, documents, ancillary information) as early as possible in the scientific process. 
• Solar System Exploration 

Common website domains

.edu = College/university websites 

.gov = Government websites - great for statistics, reports

.org = Nonprofit organizations, but can be used by any kind of organization

.com = Businesses/commercial sites

How to limit your search results to a specific domain:

Example: solar system site:.edu

Example: telescopes site:.gov

• American Astronomical Society: An international organization of professional astronomers, astronomy educators, and amateur astronomers. 
• Astronomical Society of the Pacific: An international non-profit scientific and educational organization that works to increase understanding and appreciation of astronomy. 
• European Space Agency
• The Planetary Society: A nonprofit organization dedicated to advancing space science and exploration.