Which was an accomplishment of Galileo Galilei? 1. finding elliptical galaxies

2. developing a theory of gravity

3. discovering four moons orbiting Jupiter

4. identifying continental drift

By Jan. 15, Galileo correctly concluded that they were not stars at all but moons orbiting around Jupiter, providing strong evidence for the Copernican theory that most celestial objects did not revolve around the Earth. ... As their discoverer, Galileo had naming rights to Jupiter's satellites.

Explanation:

By the terms of this boundary the United States agreed that Texas was on the Spanish side of the line, and Spain agreed to give up its claim to the Northwest Territory north of forty-two degrees. The treaty was approved by the U.S. Senate on February 24, 1819.