The ____ is the point on the celestial sphere directly above any observer.

Fill in the blank(s) with the appropriate word(s).


zenith

Physics & Space Science

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By tradition, any planet in the sunset sky is called a(n) _____

A) exoplanet B) evening star C) pulsar planet D) morning star

Physics & Space Science

Express the result of the following calculation, in scientific notation, to the proper number of significant figures: ((395600.1)/(6.72)) + 19

What will be an ideal response?

Physics & Space Science

A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a spaceship which travels away from Earth at a speed of 0.60c for five years (as measured by Courtney),

then immediately turns around and comes back at 0.60c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return? A) 20 y B) 12 y C) 10 y D) 15 y E) 18 y

Physics & Space Science

What is the study of cosmology?

What will be an ideal response?

Physics & Space Science