Earth, the Moon and the sky for kids
Start with the closest things in space: our Earth and our Moon.
All lessons
Moon phases for kids: why does the Moon change shape?
Why the Moon seems to change shape each month, the 8 moon phases explained with simple pictures, a lamp-and-ball activity and a free printable worksheet.
Why do we have day and night, and the seasons?
Why Earth has day and night and why we have four seasons: rotation, orbit and the tilt of Earth's axis explained for kids, with a flashlight experiment and a free worksheet.
What is an eclipse? Solar and lunar eclipses for kids
What is a solar eclipse and a lunar eclipse? How they happen, why they are rare, how to watch safely and a free printable worksheet for kids.
More lessons coming soon.
Take the next step
Fly to the Moon (free)
The free 3D simulator lets kids build a real Moon rocket, launch it and land on the Moon, in any browser.
Play the free demoSpace Workbook for kids
Printable fact sheets, quizzes with answers, a space passport and activities for 29 destinations, with the full simulator included.
See the Space WorkbookFacts: NASA and other space agencies, rounded for readability. Images: Astraviator simulator renders. Astraviator is not affiliated with or endorsed by NASA.