Today We Rely Largely on What Technique to Precisely Measure

question 98

Multiple Choice

Today we rely largely on what technique to precisely measure distances in the solar system?

• A) Transits of Venus across the Sun
• B) Radar echo timings
• C) Measurement of stellar parallaxes.
• D) Timings of the eclipses of its moons by Jupiter's shadow
• E) Precise measurements of length of the year with atomic clocks

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Definitions:

SPECT

Single photon emission computed tomography; a radiologic procedure in which a gamma camera detects signals induced by gamma radiation and a computer converts these signals into two- or three-dimensional images that are displayed on a screen.

Gamma Radiation

High-energy electromagnetic radiation emitted from radioactive atoms and used in medical treatments and imaging, as well as industrial applications.

Gamma Camera

A device that detects gamma radiation and creates images for diagnostic purposes in nuclear medicine.

Brain Damage

Injury to the brain that impairs its functions, possibly resulting from trauma, lack of oxygen, infections, or other causes.