The correct answer is option 1, the Hubble telescope. The Hubble Space Telescope is not specifically designed to search for Earth-sized planets in the nearby region of our galaxy, but rather it is designed to observe and study celestial objects and phenomena in space. The Hubble telescope has made significant contributions to our understanding of the universe and has provided stunning images of galaxies, stars, and planets.

Option 2, the Kepler telescope, is designed specifically to search for exoplanets, including Earth-sized planets, in the Milky Way galaxy. The Kepler telescope observes the brightness of stars and looks for periodic dips in brightness that may indicate the presence of a planet. It has been very successful in discovering thousands of exoplanets.

Option 3, the Copernicus telescope, does not exist. Nicolaus Copernicus was a famous astronomer who proposed the heliocentric model of the solar system in the 16th century.

Option 4, the Newton telescope, is not a specific telescope design. Sir Isaac Newton was a renowned physicist and mathematician who made significant contributions to the understanding of gravity and motion. However, his name is not associated with a particular telescope design for searching for Earth-sized planets.