What is a terrestrial planet?

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 […]

What is a terrestrial planet?

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 […]

NASA’s Terrestrial Planet Finder Canceled: The White House’s Increasingly Myopic “Vision” for Space Exploration | SpaceRef

Editor’s Note: According to NASA budget documentation for fiscal 2007 “The Terrestrial Planet Finding (TPF) project has been postponed indefinitely.” In other words, he’s dead. NASA is just afraid to say it. In a document entitled “A renewed spirit of discovery“released the same day that President Bush announced his vision for space exploration in January […]