reveal articles
What phenomenon describes the alteration of wave characteristics when the source is moving relative to the observer?
What specific measurement does the Doppler shift quantify?
If a sound source moves toward an observer, how does this affect the perceived frequency?
In the context of electromagnetic waves, what is a shift toward a higher frequency called?
A spectral redshift in light indicates that the astronomical source is doing what?
How is the Doppler effect most commonly experienced by humans involving sound waves?
Compared to sound, what is generally required for the Doppler shift in light to be easily detected by instruments?
What profound cosmological theory is supported by the observation that distant galaxies almost universally exhibit redshift?
Which medical technique uses ultrasound waves reflecting off moving red blood cells to measure flow velocity?
Which specific component of an object's velocity does the Doppler effect measurement reveal?
What substance was the Moon traditionally believed to be made of centuries before Galileo?
In what timeframe did Galileo begin his persistent observations that revealed the Moon's topographical features?
What specific terrestrial-like features did Galileo's observations reveal on the Moon's surface?
Galileo's discovery that the Moon shared rugged geography with Earth challenged which established cosmological division?
How did Galileo transform the visual evidence of lunar irregularities into quantifiable data?
What Latin term did Galileo establish for the vast, dark plains he observed on the Moon?
Which crucial publication disseminated Galileo's findings on the Moon across Europe in 1610?
What major cosmological model gained traction as a consequence of demonstrating the Moon's imperfection?
What aspect of Galileo's lunar observations made complex cosmology accessible to a wider public?