Common sense isn’t a reliable guide to the structure of the cosmos. Things are much, much more interesting than that:
Of course, in the image above the Moon appears to be surrounded by dark matter. Why didn’t we notice that before?
Common sense isn’t a reliable guide to the structure of the cosmos. Things are much, much more interesting than that:
Of course, in the image above the Moon appears to be surrounded by dark matter. Why didn’t we notice that before?