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Sunset over west Maui
The Color of The Sunset

Color in the form of pigment does not exist in the atmosphere. Instead, the color we see in the sky results from the scattering, refraction, and diffraction of sunlight by particles in the atmosphere, ...

Introduction To Jupiter

With its numerous moons and several rings, the Jupiter system is a 'mini-solar system.' Jupiter is the most massive planet in our solar system, and in composition it resembles a small star. In fact, i ...

Ancient Planet in a Globular Cluster Core

Long before our Sun and Earth ever existed, a Jupiter-sized planet formed around a sun-like star. Now, 13 billion years later, NASA's Hubble Space Telescope has precisely measured the mass of this far ...

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