There are plenty of craters on Mars, especially when compared to Earth. That is primarily thanks to the lack of weathering forces and strong plate tectonics that disrupt the formations of such impacts on our home planet. However, not all impact craters on Mars are directly caused by asteroid impacts. Many of them are caused […]

The first generation of stars transformed the universe. Inside their cores, simple hydrogen and helium fused into a rainbow of elements. When these stars died, they exploded and sent these new elements across the universe. The iron running in your veins and the calcium in your teeth and the sodium powering your thoughts were all […]

Sometimes planetary physics is like being in a snowball fight. Most people, if handed an already-formed snowball, can use their experience and the feel of the ball to guess what kind of snow it is composed of: packable and fluffy, or wet and icy.

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NASA engineers will test a suite of new laser technologies from an aircraft this summer for Earth science remote sensing. Called “lidar,” the instruments could also be used to improve models of the moon’s shape and aid the search for Artemis landing sites.

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Peaceful though it may seem from Earth, space is beset by “weather” that can prove perilous for the sensitive—and expensive—technology aboard the spacecraft and satellites increasingly populating the realms outside our atmosphere.

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