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Astronomy grads have limited job opportunities--- Writing ...

... of that, Europe took a long time to catch up in astronomy (until Kepler and Galileo).

186,000 miles per second 186,000 x 365 x 24 x 60 x 60 miles per year = 5865696000000 (using my calculator = 5.865696 x 10^12 miles/year

...but in reality, South Africa is well-connected to astronomy & astrophysics so it should not be a major obstacle.

...://www.queensu.ca/sgs/programs-degrees/astrophysics-astronomy https://smu.ca/academics/astrophysics.html

...math and physics, but the other available specializations in modern astronomy are things like cosmology or galactic dynamics, which are at least...

...to 24 h was Omar Khayyam. He also preferred astronomy than astrology as he thought astrology was mere entertainment.

For Exercise #4, Question A, it's asking you to find the absolute value of the shift, that is - the "size" of the difference between the observed absorption wavelength and the expected value at rest. For example, for Star A...