Zisel`, 14 июня 2018 г., 12:07
1. Which is the nearest star to earth? 2. What is one light year? 3. What is one light second? 4. What is one light minute? 5. What is the distance between the earth & the moon? 6. How many stars are normally visible? 7. Which is the largest and most luminous star? 8. Which is the nearest star visible to naked eye? 9. What is the density of stars? 10. Which is the farthest visible object at space? - Humirah
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