Controlled experiments are impossible in astronomy, as are direct measurements of physical properties of objects outside our solar system. So how do astronomers know so much about them?
Academic rigor, journalistic flair
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If you ever felt nauseous, fatigued or disoriented after using your phone or computer, you may be experiencing a condition similar to motion sickness.
Let’s talk numbers for a moment. The moon is approximately 384,000 kilometres away, and the sun is approximately 150 million kilometres away. The mean distance between Earth and the sun is known as the…
