Mercury
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A Solar System Tour
In the grand scheme of the universe, planets are small. But that doesn’t make them unimportant. We live on a planet. Understanding how planets form and how the evolution of their solar system affects them is critical to answering one…
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Einstein: Space-Time Curvature
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…
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The Ecliptic
The ecliptic, as astronomers call it, is the apparent path of the sun against the background of the stars in the sky. It’s useful because it tells us how to find the planets in the sky. They can be hard to…
