What is the rest wavelength of an emission line
Problem: What is the rest wavelength of an emission line observed at 2328 nanometers in a galaxy 100 Megaparsecs away from the Milky Way? Your answer should be significant to four digits.
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"What is the minimum number of meters away from the center of a black hole 2,616 times the mass of the Sun that an astronaut must be
Describe how Erastothenes measured the circumference of our planet.
Why can many more people witness a total lunar eclipse than a total solar eclipse? Why are some solar eclipses total, and others annular?
Relative to the stars, through how many degrees, arc minutes, or are seconds does the Moon move in (a) 1 hour of time; (b) 1 minute; (c) 1 second?
What is the rest wavelength of an emission line observed at 2328 nanometers in a galaxy 100 Megaparsecs away from the Milky Way?
Problem: Describe the controversy surrounding meteorite ALH84001.
If a spaceship is approaching you at a speed of .75 the speed of light, what is the new wavelength for a blue laser that's shown at you?
A scientific model is an explanation of how a process resulted in things that are observed.
Please write down and clearly label Kepler's laws. You may transcribe them from, or use your own words.
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