21.   Since the two giant planets have similar atmospheres, it is assumed that spots differing in color have different causes.

22.   The planets have to be aligned for me to strike out nine.

23.   The planet thus could have water in vapor and liquid forms alike.

24.   The startling discoveries reveal that the planets may have water and could possibly sustain life.

25.   This planet does not have unlimited resources.

26.   Thus, if the newfound planets have moons, chances are those could make ideal habitats for life.

27.   To rust, though, the planet must have a source of oxygen.

28.   But experts believe that the planet once had oceans, an atmosphere and a magnetic field.

29.   It is considered unlikely that the planet will have chemicals suggestive of life, however.

30.   Most planets have relatively circular orbits, but this one apparently orbits its star in a high elliptical path.