Why is the Sky Blue?

When sunlight reaches Earth’s atmosphere, it bounces off of molecules. The air molecules scatter light — just like billiard balls do when they collide. The shorter the wavelength of the light, the more it gets scattered. This is why the sun’s light looks blue. Sky Blue Is Due to Rayleigh Scattering Sky blue is a …

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The Planet in Space

Mars is a rocky planet that orbits our Sun, a star. Like Earth, it has clouds, winds, seasons, polar ice caps, volcanoes and canyons. It also has two moons: Phobos, an inner moon, and Deimos, an outer one. Both are pockmarked with craters from meteor impacts. The Red Planet Mars is the next planet out …

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Mars Planet View

Mars, the Red Planet, is a fascinating object in the night sky. It is one of the brightest objects in the sky and is easily spotted with the naked eye, a telescope or binoculars. Mars orbits the Sun in an elliptical path, completing one orbit every 687 days. The planet goes into opposition, when it …

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