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Q4: Large regular moons probably formed:<br>A)when passing asteroids
Q6: All the giant planets,not just Jupiter,have atmospheric
Q13: The spectrum of a galaxy is observed
Q21: Stars X and Y are 5 AU
Q35: Approximately _ of spiral galaxies are barred.<br>A)10
Q40: What is the Lorentz factor for an
Q54: The spectra of most galaxies tell us
Q58: We see the universe around us expanding,which
Q58: Do a planet's rings last forever? Why
Q78: What are the orbital characteristics of a