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Stanford Solar Center

The Sun's axis is tilted 7 degrees from the vertical. Because the Earth moves around the Sun, sometimes that tilt is pointing directly away from us, sometimes directly toward us, and sometimes in between. When Galileo drew his sunspots, he drew them as he saw the Sun through his telescope, with the Sun's "north pole" pointing in whatever direction it happened to lay at that time. Thus Galileo's sunspots may appear to be traveling "down" across the disk

The SOHO images have been carefully adjusted to make sure the Sun's north pole is always pointing straight up in the pictures. So your sunspots should appear to be traveling horizontally across the disk.

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