Here is a reading on the solar system along with its accompanying vocabulary-building and comprehension worksheet. This is a short reading with the standard eight-by-eight (i.e. eight vocabulary words to define, eight comprehension questions ) worksheet that I composed for all these readings.
If you find typos in these documents, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.