NASA
Nasa: Astronomy Picture of the Day: Scale of the Universe 2
This stunning interactive allows you to explore everything in this universe by zooming into different objects, organisms, and microscopic matter.
PBS
Pbs Learning Media: How Big Is Our Universe?
This interactive resource from Harvard Smithsonian Center for Astrophysics uses images and activities to understand the scope and scale of our universe. Featured are technologies used by generations of explorers.
Khan Academy
Khan Academy: Quiz: Scale
Test your knowledge with this quick quiz on the scale of the Universe. Hints are given when needed!
Other
Htwins: The Scale of the Universe
Understand the power of tens, with this interactive scale of the universe that takes you from the microscopic to macroscopic. Click on the objects to learn more about their size and properties.