Discovered that there were other galaxies besides the milky way.
a. edwin hubble
b. albert einstein
c. galilei galileo
d. sir isaac newton

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

The heliocentric and the geocentric models of the solar system included these central principles

The ph is the a.independent variable b.the dependent variable c.control group