Earth & Space
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Planets, weather, oceans and the sky above them.
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How astronomers measure a star's distance by looking from both sides of the Earth's orbit: parallax
Hold a thumb at arm's length and blink one eye, then the other: the thumb jumps against the background. Astronomers do the same with the whole orbit of the…
Earth is closest to the Sun in January. So why is that winter?
Summer can't be caused by being closer to the Sun: Earth makes its closest pass around 3 January and is farthest around 4 July. The distance changes by only…