Tag Archives: gravity

The Battery of the Sun

Does this image look familiar? It should—these are soap bubbles. Okay, now you’re probably going to ask me how soap bubbles have anything to do with the battery of the sun. Well…you might be surprised to know that soap bubbles … Continue reading

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Einstein: Space-Time Curvature Confirmed

When you hear about “space-time,” it’s just a way to say that space is related to time. And the curvature of space-time, as Albert Einstein predicted, is the way space and time alike literally bend around a mass such as the … Continue reading

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Einstein: General Relativity

Albert Einstein may have been the genius among physicists, but like all others before his time, he stood on the shoulders of giants. Einstein did not propose that the sun was the center of the solar system; that idea was … Continue reading

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Moving with the Tides

Have you ever been to the beach? If you’re from California like me, then I’m betting you have. If you’re from a place that’s not near an ocean and you’ve never been near the water all your life, then I’ll … Continue reading

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How Orbits Work

Since Aristotle’s time over 2000 years ago, we have accepted that the moon orbits the Earth. We didn’t always know why, and we didn’t always accept this for the right reasons. We used to assume that it happened just because … Continue reading

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Newton and Gravity

So, the moon stays in orbit around the Earth, right? Yeah, I thought so. But why? The moon’s orbit is not a straight line, which means it’s accelerated motion (using the physics definition, which is absolutely any change in speed or … Continue reading

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Newton’s Laws of Motion

It’s said that Sir Isaac Newton was sitting under an apple tree when an apple fell on his head, and that’s when all his discoveries began. Personally, I doubt that story—just as I doubt that Galileo Galilei ever dropped iron and … Continue reading

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Galileo and Motion

Before Galileo’s time, Aristotle was the god of gravity. Seriously. Before Galileo came along, the question of how gravity worked was answered with another question: “What would Aristotle say?” Obviously, this method was faulty, since Aristotle was actually wrong about … Continue reading

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Precession

We have a bit of a shorter post today—I thought precession warranted its own post, before I go on to talking about the ecliptic. Precession is refers to the way Earth wobbles around on its axis, a bit like a … Continue reading

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