Is Uranus the smallest planet? What are the main constituents of the Jovian planets? What is the Jovian system? Which of Jupiter's moons orbits closest to the planet? What is the biggest planet in the solar system? Are Jovian planets larger than terrestrial planets?
What characteristics of Venus' atmosphere make the planet so harsh? What characteristics do Neptune and Uranus have in common? How many rings does Ceres have? What are Kepler's laws known for? How big is the planet Ceres? How long would it take to get from Earth to Ceres? Is Ceres a ...
Hart MH (1978) The evolution of the atmosphere of the earth. Icarus 33: 23 ADS Google Scholar Hart MH (1979) Habitable zones around main sequence stars. Icarus 37: 351 ADS Google Scholar Heikkila WJ, Winningham JD (1971) Penetration of magnetosheath plasma to low altitudes through the ...