The terrestrial planets of our solar system at approximately relative sizes. From left to right, Mercury, Venus, Earth and Mars. Credit: Lunar and Planetary Institute By studying our solar system over several centuries, astronomers have learned a lot about the types of planets that exist in our universe. This knowledge has since expanded with the […]
Monthly Archives: July 2015
The terrestrial planets of our solar system at approximately relative sizes. From left to right, Mercury, Venus, Earth and Mars. Credit: Lunar and Planetary Institute By studying our solar system over several centuries, astronomers have learned a lot about the types of planets that exist in our universe. This knowledge has since expanded with the […]