3 Question 1 (1 point)
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The paths of the planets across the celestial sphere are very close to the ecliptic,
because:

the planets take one year to orbit the Sun.

the planets are fixed in the sky on the ecliptic.
the planets all orbit in almost the same plane.

Which is a substance that can be separated by physical means and is not the same throughout

What is the largest meteoroid that has collided with this planet

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength