Search results for planetesimals

Planetary Sciences Mar 4, 2024

James Webb Space Telescope captures the end of planet formation

The James Webb Space Telescope (JWST) is helping scientists uncover how planets form by advancing understanding of their birthplaces and the circumstellar disks surrounding young stars.

Astronomy Mar 18, 2022

NASA spots giant debris cloud created by clashing celestial bodies

Major smashups between rocky bodies shaped our solar system. Observations of a similar crash give clues about how frequent these events are around other stars.

Astronomy Dec 20, 2021

How NASA's Psyche mission will explore an unexplored world

Launching in August 2022 and arriving at the asteroid belt in 2026, NASA's Psyche spacecraft will orbit a world we can barely pinpoint from Earth and have never visited.

Astronomy Dec 14, 2021

Stellar 'ashfall' could help distant planets grow

The world's first 3D simulation simultaneously considering dust motion and growth in a disk around a young star has shown that large dust from the central region can be entrained by and then ejected by gas outflows, and eventually ...

Astronomy Oct 29, 2021

Building planets from protoplanetary discs

Planets and their stars form from the same reservoir of nebular material and their chemical compositions should therefore be correlated but the observed compositions of planets do not match completely those of their central ...

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, ...

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 ...

Astronomy Nov 3, 2020

Mars plays shepherd to our moon's long-lost twin, scientists find

An international team of planetary scientists led by astronomers at AOP have found an asteroid trailing behind Mars with a composition very similar to the moon's. The asteroid could be an ancient piece of debris, dating back ...

Astronomy Oct 5, 2020

It took several million years for Arrokothn to acquire its bizarre, pancake-flat shape

The trans-Neptunian object Arrokoth, also known as Ultima Thule, which NASA's space probe New Horizons passed on New Year's Day 2019, may have changed its shape significantly in the first 100 million years since its formation. ...

Astronomy Jul 29, 2020

Studying radioactive aluminum in stellar systems unlocks formation secrets

An international team of astronomers including Stella Offner of the University of Texas at Austin has proposed a new method for the formation of aluminum-26 in star systems that are forming planets. Because its radioactive ...

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