Microbes blasted off a planet by an asteroid strike may survive the journey to another world, including Earth, according to a ...

Planetesimals are among the first solid bodies to form as dust and pebble-sized material clumps together under gravity. Much like snowflakes compressed into a snowball, they are loose aggregates ...

These peculiar celestial 'snowmen' are found in the Kuiper Belt, a vast expanse beyond Neptune, which is filled with icy remnants dating back to the solar system's formation. The region lies beyond ...

A strange metal rich asteroid called Psyche may be the exposed core of an ancient failed planet, and NASA’s mission could finally reveal what lies beneath its battered surface.

On February 23, 1990, NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the ...

Far beyond Neptune, in the frozen depths of the Kuiper Belt, many ancient objects oddly resemble giant snowmen made of ice and rock. For years, scientists wondered how these delicate two-lobed shapes ...

Researchers simulated how gravitational collapse forms two-lobed contact binaries in the Kuiper Belt without destructive collisions.

Astronomers had decent guesses about how these peanut-shaped asteroids formed but couldn’t get the physics to work—until now.

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When NASA’s Dawn spacecraft reached Vesta in 2011, it found a 500-kilometer-wide world scarred by two planet-scale impacts. One crater stretches over 100 kilometers across and rises 20–25 kilometers ...

Astronomers have puzzled for years over a strange pattern in the outer solar system. A surprising number of icy bodies far beyond Neptune resemble snowmen, made of two rounded lobes stuck together.