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Search results for planetesimals

Planetary Sciences Jun 9, 2021

Asteroid 16 Psyche might not be what scientists expected

The widely studied metallic asteroid known as 16 Psyche was long thought to be the exposed iron core of a small planet that failed to form during the earliest days of the solar system. But new University of Arizona-led research ...

Planetary Sciences Apr 29, 2021

Meteorites reveal magnetic record of protoplanet churn

If you stumble upon an unusual rock that could be a meteorite, do not place a magnet on it to see if it's magnetic—you'd end up erasing 4.5 billion years of magnetic history. Meteorites are remnants of our solar system's ...

Astronomy Apr 19, 2021

When stars get too close to each other, they cast out interstellar comets and asteroids

In October 2017, humanity caught its first-ever glimpse of an interstellar object—a visitor from beyond our solar system—passing nearby the sun. We named it "Oumuamua, and its unusual properties fascinated and confounded ...

Space Exploration Apr 12, 2021

Why primordial asteroids that avoided massive collisions all seem to be about the same size

Planetary systems form out of the remnant gas and dust of a primordial star. The material collapses into a protoplanetary disk around the young star, and the clumps that form within the disk eventually become planets, asteroids, ...

Earth Sciences Apr 2, 2021

From stardust to pale blue dot: Carbon's interstellar journey to Earth

We are made of stardust, the saying goes, and a pair of studies including University of Michigan research finds that may be more true than we previously thought.

Astronomy Jan 22, 2021

The seven rocky planets of TRAPPIST-1 seem to have very similar compositions

The red dwarf star TRAPPIST-1 is home to the largest group of roughly Earth-size planets ever found in a single stellar system. Located about 40 light-years away, these seven rocky siblings provide an example of the tremendous ...

Astronomy Jan 21, 2021

Solar system formation in two steps

An international team of researchers from the University of Oxford, LMU Munich, ETH Zurich, BGI Bayreuth, and the University of Zurich discovered that a two-step formation process of the early Solar System can explain the ...

Astronomy Dec 30, 2020

Observations shed more light on the atmosphere of white dwarf GD 424

Astronomers have performed spectroscopic observations of a newly detected white dwarf star known as GD 424. Results of the observational campaign provide more insights into the atmosphere of this object. The study was presented ...

Astronomy Dec 17, 2020

Can white dwarfs help solve the cosmological lithium problem?

For the first time, hard-to-find lithium has been identified and measured in the atmosphere of burned out stars called white dwarfs, according to a study led by the University of North Carolina at Chapel Hill published online ...

Astronomy Nov 30, 2020

Fast-moving gas flowing away from young star caused by icy comet vaporisation

A unique stage of planetary system evolution has been imaged by astronomers, showing fast-moving carbon monoxide gas flowing away from a star system over 400 light years away, a discovery that provides an opportunity to study ...

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