The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...

This year's fall equinox takes place on Saturday, September 22, 9:54 p.m. Eastern time, marking the end of summer, according to the weather channel.

If you've spent time in Manhattan parks or theaters, you've likely seen the work of architect and designer David Rockwell. Hear him discuss finding inspiration, creating immersive environments and building with technology.

This video explains how the four seasons - winter, spring, summer, and autumn - are experienced differently depending on where we are located on Earth. It explores the unique characteristics, beauty, and dangers of each season and how...

Through telescopic video and photos combined with animated graphics, students will learn about the layers of the sun and its effects on earth, the moon and all the objects in our solar system and the universe.

This video explores the features of spring, focusing on the unique habits of plants, animals, and people during this season. Additional concepts and terminology: season, sunlight, warmth, hibernation, migration, revolution, axis, and...

Planets Set: 5. This clip examines the astronomical events behind equinoxes and solstices.

This video discusses how the Earth's tilt and revolution around the Sun are responsible for the different seasons. This video is part of the 11-part series, Earth, Sun, and Moon.

The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...

The transition from summer to autumn is usually marked by cool breezes and leaves changing color, though officially, fall does not begin until the autumnal equinox. The Earth is split by the the equator into northern and southern...

This live-action video program is about the word equinox. The program is designed to reinforce and support a student's comprehension and retention of the word equinox through use of video footage, photographs, diagrams and colorful,...

This video provides an explanation of the solstices and equinoxes, which are important astronomical events that mark the changing seasons.<b<br/>r/>

This video is part of the 8-part series, Earth’s Rotation and Revolution.

The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...

The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...

The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...

The orbit of Earth on a tilted axis around the sun leads to the seasons. The resulting change of angle of the sun, and length of day controls how warm we get at different times of the year. With those changes in seasons come changes in...