Space

Among the asteroids, small worlds orbiting the Sun between Mars and Jupiter, we find those genetically related to each other. They are members of the…
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The gravitational field outside a planet, a moon, an asteroid, or a comet is crucial for determining that body’s mass, density, and some details of…
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Most of the surface of Mars is currently too cold, and the atmosphere is too thin, for liquid water to be present on the surface….
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Many mid-latitude impact craters on Mars are filled to variable degrees with a combination of ice, dust, and rocky debris. Ring-shaped surface features visible in…
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Life as we know it is based on water and organic compounds. Studying how water and organics form, evolve and move within our Solar System…
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The moon is considered to have experienced a magma ocean, with whole-body melting. Differentiation and crystallization of the melt formed today’s crustal Moon. Major elemental…
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Our solar system contains a myriad of bodies with sizes ranging from a few meters to hundreds of kilometers. We call them asteroids. The most numerous…
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The icy satellites of the outer solar system pose numerous puzzles, one of which is sometimes referred to as the Mimas-Enceladus paradox (e.g., Czechowski &…
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Photographs of the nucleus of comet 67P/Churyumov-Gerasimenko show its unexpected shape: two ellipsoidal blocks called the Head and Body, connected by a “neck.” On the…
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The poles of Mars host massive amounts of water ice in the form of polar caps, much like Earth’s Antarctica. In the north, a ~1.5…
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The seventh most distant planet in our Solar System, Uranus, is orbited by the mid-sized regular satellites Miranda, Ariel, Umbriel, Titania, and Oberon (Figure 1)….
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