31.   Both planets are glorious sights through telescopes.

32.   But even then the problems of communication and supply will ensure that any newly colonized planets will be effectively on their own.

33.   But keep in mind that planets are not perfect spheres.

34.   But the apparent profusion of such stars has encouraged astronomers to think that smaller planets may be abundant as well.

35.   But the newly discovered planet is also, astronomers said.

36.   But the planet is no substitute for a neighborhood.

37.   But where there are planets, at least in our experience, there are almost always moons.

38.   By the simplest definition, a planet is a large object that orbits a star.

39.   By searching for this tell-tale wobble, astronomers can identify which stars have planets around them, and even how large the planets are.

40.   Destroying without reason the living things that make our earth habitable by humans is a major reason the planet is in trouble.