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One half of the moon is hotter than the other

Anomalies in the moon’s gravitational field suggest our satellite’s insides are warmer on one side than the other – which means that its interior is asymmetric

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KHKRFM Haumea and moons, illustration. Haumea is a dwarf planet in the Kuiper Belt. It is noted for its elongated shape, somewhat like a rugby ball. It is orbited by at least two moons and a narrow ring of rocky particles.

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How to spot Haumea, one of the solar system's strangest objects

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The Mysterious NWA 15915

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Weird meteorite may be relic of lost planet that no longer exists

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Mars appears light blue in this near-infrared image from the Hera spacecraft, with its moon Deimos represented by a dark mark towards the centre of the image

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Hera asteroid mission takes stunning images of Mars’s moon Deimos

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Saturn gains 128 moons, giving it more than the other planets combined

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There’s a tiny chance the asteroid headed for Earth could hit the moon

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How meteorites are rewriting the history of the solar system

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Mars and Phobos. Computer artwork of how Mars (left) and its tiny moon Phobos (upper centre) might appear from a distance of about 100 miles from the surface of Phobos. Phobos is the larger of Mars' two satellites (the other being Deimos), being about 16 miles long and about 11 miles across at its smallest dimension. It may be an asteroid long ago captured by Mars' gravity and does not have enough mass for gravity to pull it into a uniform sphere like the larger satellites and planets in the Solar System.

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Why we must investigate Phobos, the solar system's strangest object

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Most detailed survey of particles around the sun reveals new mysteries

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How to see all the solar system’s planets in the night sky at once

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show

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The physicist on a mission to understand Mercury's epic solar storms

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BepiColombo snaps Mercury's dark craters and volcanic plains

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Our only visit to Uranus came at an unusual time for the planet

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Distant dwarf planet Makemake might have a surprising ice volcano

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