Doppler effect articles
What physical effect determines if a star is racing toward or receding from Earth?
What does observing a blueshift in a star's spectrum definitively indicate about its motion relative to Earth?
What physical feature forms the unique spectral fingerprint analyzed by astronomers?
What component of a star's motion is measured by the Doppler shift, known as radial velocity?
If a star is moving away from Earth, what happens to the light waves it emits?
What is the local gravitational significance of detecting a blueshift from the Andromeda Galaxy?
How is the fractional change in wavelength ($ rac{\Delta\lambda}{\lambda_0}$) mathematically related to the star's radial velocity ($v$)?
What is the primary observational evidence cited regarding the vast majority of distant galaxies?
What is required to precisely measure the incredibly small wavelength shifts for nearby stars?
How does the 'wobble' of a star due to an orbiting planet cause detectable spectral changes?
For Mars missions, what radiation component becomes the dominant concern past the Van Allen belts?
What phenomenon results when highly penetrating GCR heavy ions strike biological tissue unevenly?
What major biological response within the central nervous system is initiated by radiation exposure from heavy ions?
Damage to what specific brain function, essential for learning and memory, involves changes in connections between neurons and support cells like glia?
Which set of astronaut functions relies on an intact frontal cortex and hippocampus and may suffer cognitive impairment from radiation?
What types of countermeasures are required to address physical radiation exposure versus psychological challenges like isolation?
Protons, helium nuclei, and what other particles comprise the high-energy atomic nuclei known as Galactic Cosmic Rays (GCRs)?
What type of radiation are thicker hull materials (passive shielding) proven highly effective against but significantly less effective against GCR heavy ions?
How does the radiation exposure profile during long-duration space travel fundamentally differ from terrestrial radiation therapy regarding dose rate?