Podcast
Questions and Answers
What did Hubble use to measure the speeds of celestial objects?
What did Hubble use to measure the speeds of celestial objects?
- Satellite images
- Telescopic observations
- Spectroscopic red-shift data (correct)
- Radio signals
What did Arno Penzias and Robert Wilson initially think the 'noise' they discovered was?
What did Arno Penzias and Robert Wilson initially think the 'noise' they discovered was?
- Reflection of radio signals off orbiting satellites
- Interference from other galaxies
- Cosmic microwaves
- Radio interference from nearby New York City (correct)
What did Hubble's discovery of the speeds of celestial objects lead to?
What did Hubble's discovery of the speeds of celestial objects lead to?
- Theory of relativity
- Quantum mechanics
- String theory
- Hubble’s law (correct)
What did Arno Penzias and Robert Wilson eventually recognize the 'noise' as?
What did Arno Penzias and Robert Wilson eventually recognize the 'noise' as?
What did Hubble's discovery lead some to consider as a possible explanation?
What did Hubble's discovery lead some to consider as a possible explanation?
Flashcards
What is Spectroscopic red-shift data?
What is Spectroscopic red-shift data?
The change in wavelength of light emitted from a celestial object due to its motion relative to the observer. Red-shift occurs when an object is moving away from the observer, causing the light to shift towards longer wavelengths, which appear redder.
What is Hubble's law?
What is Hubble's law?
Hubble's law describes the relationship between the distance of a galaxy and its recessional velocity. It states that the farther a galaxy is from us, the faster it is moving away from us.
What did Penzias and Wilson initially think the 'noise' they discovered was?
What did Penzias and Wilson initially think the 'noise' they discovered was?
Penzias and Wilson initially believed the noise they detected was interference from equipment or sources within the Milky Way galaxy.
What did Arno Penzias and Robert Wilson eventually recognize the 'noise' as?
What did Arno Penzias and Robert Wilson eventually recognize the 'noise' as?
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What did Hubble's discovery lead some to consider as a possible explanation?
What did Hubble's discovery lead some to consider as a possible explanation?
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Study Notes
Hubble's Discovery
- Hubble used spectrographs to measure the speeds of celestial objects
Cosmic Microwave Background Radiation
- Arno Penzias and Robert Wilson initially thought the 'noise' they discovered was radio interference from pigeon droppings on their antenna
- Hubble's discovery of the speeds of celestial objects led to the understanding of the expanding universe
- Penzias and Wilson eventually recognized the 'noise' as the cosmic microwave background radiation, evidence of the Big Bang Theory
- Hubble's discovery led some to consider the Big Bang Theory as a possible explanation for the origin of the universe
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Description
Test your knowledge of the Big Bang Theory with this quiz. Watch a video and answer questions about cosmologists, particle physicists, the timeline of the Big Bang, and evidence supporting the theory. See how much you know about the origins of the universe.
