Unit 8 Astronomy
What is the universe?
-
Universe and Stars
-
Earth's place in the universe
-
History of planet earth
-
Earth & in the solar system
-
Stars and Galaxies
- The Universe and Big Bang Theory
- Life Cycle of Stars
- Types of Galaxies
The Solar System
- Planets and Their Characteristics
- Moons, Asteroids, Comets
Earth in Space
- Earth’s Rotation and Revolution
- Seasons and Eclipses
Earth's Rotation
The Earth rotates on its axis relative to the Sun every 24.0 hours mean solar time, with an inclination of 23.45 degrees from the plane of its orbit around the Sun.
Earth' Revolution
"Revolution" refers the object's orbital motion around another object. Earth revolves about the Sun, producing the 365-day year. The moon revolves around the earth.
Seasons
The four seasons—spring, summer, fall, and winter—follow one another regularly. Each has its own light, temperature, and weather patterns that repeat yearly.
The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons. When the earth's axis points towards the sun, it is summer for that hemisphere. When the earth's axis points away, winter can be expected.
Phases of the Moon
An eclipse is an astronomical event which occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer.
Earth in Space
Ecentricity
Eccentricity measures how much the shape of Earth's orbit departs from a perfect circle. In Earth science, an ellipse is a flattened or stretched out circle that is the shape of a planet's orbit. These variations affect the distance between Earth and the Sun.
Seasons
The four seasons—spring, summer, fall, and winter—follow one another regularly. Each has its own light, temperature, and weather patterns that repeat yearly.
The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons. When the earth's axis points towards the sun, it is summer for that hemisphere. When the earth's axis points away, winter can be expected.