Astronomy: Age 13

5 illustrated Astronomy lessons for Age 13.

Planets circling the Sun The Sun's strong gravity pulls on all eight planets and keeps them travelling around it in nearly circular pat…
Why Earth Has Seasons Earth's axis is tilted by 23.4° and keeps pointing the same way in space as Earth travels around the Sun. So f…
Earth's Tilt and Seasons Earth's axis is tilted about 23.4 degrees and keeps pointing the same way as Earth travels around the Sun. Thi…
A Star Becomes a Black Hole A very massive star can run out of fuel and collapse. Its outer layers blast away, and the core can shrink int…
Moon Hides the Sun The Moon is much smaller than the Sun, but it is much closer to Earth. That is why the Moon can cover the Sun …