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Expansion Of The Universe
Edwin Hubble observed that the light from distant galaxies was redshifted, indicating they were moving away from us. The further away the galaxy, the greater the redshift, meaning more distant galaxies were receding faster. This led to the conclusion that the universe is expanding, with all galaxies moving away from each other. While the expansion provides evidence for the big bang theory, it also raises questions about dark matter providing more gravity than visible matter, as well as the acceleration of the expansion due to dark energy.
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Expansion Of The Universe
- 1. Expansion of theUniverse 11/13-14/07 Ms. Shinkle
- 2. Edwin Hubble’s FindingsObserved atomic spectra from stars Atomic spectra from stars shifted from expected More shift from galaxies further away
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- 4. Red Shift &Blue Shift If source receding, waves red-shifted If source approaching, waves blue-shifted
- 5. What Red-Shift MeansAll galaxies moving away from each other More shift means greater velocity Distant galaxies moving faster
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- 7. Dark Matter &Other Mysteries Evidence of more gravity than matter that can be seen Dark Matter Expansion of galaxies seems to be speeding up Dark Energy
- 8. What’s in theUniverse