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Which of the following people did NOT accept a heliocentric model for the universe?

Tycho Brahe’s greatest contribution to astronomy was

A totally eclipsed Moon glows coppery red because

What is the wavelength of the shortest wavelength light visible to the human eye?

When it is winter in the northern hemisphere, it is ____ in the southern hemisphere.

At the time of the winter solstice (the start of winter) the sunlight is at a lower angle and thus is ____ than(as) in the start of summer in the northern hemisphere.

If you see the stars and constellations rotating around a point in the night sky in the clockwise direction, you are looking north.

Of the lines drawn in the picture, which one traces the path of the Sun during fall in the northern hemisphere?  

A hotter star is brighter than a cooler star of the same size. Assume both are typical stars.

Sit on the floor with your legs straight out, raise your straight arm out with your thumb up such that your thumb aligns with one of your big toes, rapidly blink your left and right eye, and observe how your big toe appears to shift positions. This demonstration is an example of _________________.