Astronomers can measure the magnetic fields of sunspots using the ____, which splits spectral lines into multiple components
a. Galileo effect
b. Babcock effect
c. Zeeman effect
d. Maunder effect
e. Payne effect
c
Physics & Space Science
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A light-year is
A) about 10 trillion kilometers. B) the time it takes light to reach the nearest star. C) the time it takes light to travel around the Sun. D) about 300,000 kilometers per second.
Physics & Space Science
The period of a satellite circling planet Nutron is observed to be 84 s when it is in a circular orbit with a radius of 8.0 × 10^6 m. What is the mass of planet Nutron?
a. 6.2 × 10^28 kg b. 5.0 × 10^28 kg c. 5.5 × 10^28 kg d. 4.3 × 10^28 kg e. 3.7 × 10^28 kg
Physics & Space Science
When it is summer in Australia, the season in the United States is
A. winter B. summer C. spring
Physics & Space Science
Stars of spectra type K have strong Balmer lines
a. True b. False Indicate whether the statement is true or false
Physics & Space Science