Stars and Habitable Planets
Find out what makes a habitable star system: suitable stars, habitable zones around stars, galactic habitable zones, planet formation, and circular orbits.
Habitable Zone (HZ) - Internet Encyclopedia of Science
The Habitable Zone: An imaginary spherical shell surrounding a star throughout which the surface temperatures of any planets present might be conducive to the origin and development of life as we know it.
Goldilocks and the Three Planets
Essay by Calvin W. Johnson addressing the climates of terrestrial planets, particularly the formation of Earth's climate which supports life.
The Goldilocks Zone - NASA News
NASA article about how our understanding of how life can exist in extreme environments on Earth has expanded our search for life elsewhere in the Universe.
Our "Goldilocks" Solar System
Sky & Telescope article about one of the hottest research areas in astronomy, modeling, trying to figure out how planets form and what happens after they do.
The Goldilocks Zone - Challenger Center
The Goldilocks Zone is the range of environmental conditions (such as temperature, pressure, acidity, salinity, etc.) that can support life. Find K-12 activities for the classroom that deal with the search for life in the universe.
Galactic Habitable Zones
Astrobiology Magazine discusses how our solar system's placement within the Milky Way Galaxy makes in capable of supporting life.
Habitable Zone - Wikipedia
Article about the Habitable Zone, a region of space where conditions are favorable for life as it may be found on Earth.