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Did you know that you would be a different age if you lived on Mars? It's true!

In this online activity, learners build their own system of heavenly bodies and watch the gravitational ballet.

In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.

In this fun and simple hands-on astronomy activity, learners construct a model of our place in the Milky Way Galaxy and the distribution of stars, with a quarter and some birdseed.

In this activity, learners build a scale model of the solar system using a roll of toilet paper.

In this online interactive challenge, learners choose items to represent the Earth or solar system, then determine other items to represent the Moon, or Milky Way based on their relative size.