Geocentric Science
Related Articles
- A Quick Review on Polaris
- Celestial Motion
- Earth’s Layers
- Earth’s Magnetic Field
- Earth’s Revolution
- Earth’s Rotation
- Kepler's Second Law
- Luminosity and Temperature of Stars
- Reasons for the Seasons
- Solar Wind and the Magnetosphere
- Spectral/Emissions Lines and the Expanding Universe
- Star Trend Definitions and Concepts
- The Apparent Path of the Sun
- The Big Bang Theory
- The Coriolis Effect
- The Doppler Effect
- The Equinoxes
- The Formation of Earth
- The Life Cycle of a Massive Star
- The Life Cycle of an Average Star (Our Sun)
- The Milky Way Galaxy
- The Northern Lights
- The not-so Solid Earth
- The Summer Solstice
- The Winter Solstice
Other Categories
Image by rmforall@comcast.net
Proving that the Universe is Expanding
An article about Astronomy & Deep Space
Stationary Object Emitting Sound/Light
The object emits wavelengths that are equal because object is NOT moving. Therefore, the same wavelength (same frequency) observed no matter where the observer is located.
Object is Moving (Slower than the Speed of Sound/Light)
All wavelengths are not equal and therefore different frequencies (pitches) will be observed (heard or seen).
Position A: Object is moving away from the person; wavelength is long (low frequency, low pitch) and a red light is observed. This is known as the Redshift.
Position B: Object is moving towards the person; wavelength is short (high frequency, high pitch) and a blue or violet light is observed. This is known as the Blueshift.
The Red Shift
Astronomers see red light when looking at distant galaxies and therefore, galaxies are moving away from us. This is known as the Redshift (long wavelength’s) and this proves that since the Big Bang, the universe has been expanding.
Do you have questions about this article? Email Jessica to get additional information.
Follow @GeocentricSci on Twitter
The content of GeocentricScience.com is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License.