In this Mystery, students investigate what it takes to make a stationary object’s shadow move.

In this Mystery, students develop a model of the sun’s daily path across the sky, then use this model to help someone who’s lost.

In this Mystery, students will be introduced to the Earth’s orbital movement around the Sun, as a means of seeing why the constellations change.

Students explore patterns of observable phenomena, specifically duration of daylight and seasonal changes in the northern and southern hemispheres, to consider how the Earth–Sun relationship results in those observed patterns.

Welcome to nature’s most amazing light show.

It takes approximately 365.25 days for Earth to orbit the Sun — a solar year.

In this episode, Sabrina chats about this imaginary line called the Ecliptic and its cycle in the sky.

In this episode of Crash Course Kids, Sabrina talks about the Earth’s rotation and revolution and how these things contribute to night and day and how Earth’s tilt gives us seasons.

Have you ever wondered why your shadow is longer sometimes and shorter others?

In this episode of Crash Course Kids, Sabrina chats about how the tilt of the Earth makes for both prime and not-so-prime growing conditions for things like pineapples.

In this episode of Crash Course Kids, Sabrina talks about how the Earth’s tilt is responsible for Winter, Spring, Summer, and Fall.

Answers to your moon questions with John O’Meara, chief scientist at the W.M. Keck Observatory.