Earth discovery
Space Explorer: Choose the object that can look bright because it gives off its own light.
Compare observable sky objects while respecting the limits of pictures and scale models.
Objects that look the same size in a picture are the same real size and distance.
Use apparent size language and explicitly mark pictures that are not to scale.
1-ESS1-1 / 1-PS4-2
Educator review is required before verified-release status.