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Some young suns align with their planet-forming disks, others are born tilted

Researchers at UC Santa Barbara, The University of Texas at Austin, Yale University and National Taiwan Normal University have found that a fair number of sun-like stars emerge with their rotational axis tilted with respect to their protoplanetary disks, the clouds of gas and dust from which solar systems are born.

“All have these disks, but we’ve known little about their orientations with respect to the spin axis of the host stars,” said UCSB associate physics professor Brendan Bowler, who studies how planets form and evolve through their orbits and atmospheres, and is senior author of a study in the journal Nature. Based on the general alignment of our own sun’s with those of the planets in our solar system, the assumption was that stars and their planet-forming disks emerge and rotate in or very close to alignment, he explained.

“This work challenges these centuries-old assumptions,” Bowler said.

Scientists Were Wrong: Apollo 16 Rocks Rewrite the Story of the Moon’s Exosphere

The Moon’s surface is constantly exposed to the solar wind, a stream of charged particles emitted by the Sun. These energetic ions can dislodge atoms from the Moon’s outermost rocky layer, contributing to the formation of a very sparse layer of gas around the Moon known as the exosphere. However, the exact mechanism behind the creation of this exosphere has remained unclear.

Researchers at TU Wien, working with international collaborators, have now shown that a major contributing process, sputtering caused by the solar wind, has been greatly overestimated in earlier studies. This discrepancy stems from previous models overlooking the Moon’s actual surface texture, which is rough and porous.

For the first time, the team used original Apollo 16 samples in high-precision laboratory experiments, along with advanced 3D modeling, to calculate more accurate sputtering rates. Their findings are published in Communications Earth & Environment.

Scientists just recreated the Universe’s first molecule and solved a 13-billion-year-old puzzle

Long before stars lit up the sky, the universe was a hot, dense place where simple chemistry quietly set the stage for everything to come. Scientists have now recreated the first molecule ever to form, helium hydride, and discovered it played a much bigger role in the birth of stars than we thought. Using a special ultra-cold lab setup, they mimicked conditions from over 13 billion years ago and found that this ancient molecule helped cool the universe just enough for stars to ignite. Their findings could rewrite part of the story about how the cosmos evolved from darkness to light.

Galaxy Scale Megastructures & Kardashev 3 Civilizations

Imagine engineering projects so vast they mold galaxies into new shapes. We’ll explore the staggering feats of Kardashev-3 and beyond civilizations, crafting CARD galaxies, Birch Planets, and even rearranging superclusters.

Watch my exclusive video Dark Biospheres: https://nebula.tv/videos/isaacarthur–
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Credits:
Spaceport Innovations — Designing the Next Generation of Launch Sites.
August 3, 2025; Episode 746
Written, Produced & Narrated by: Isaac Arthur.
Galaxy-Scale Megastructures & Kardashev-3 Civilizations.
Written by: Isaac Arthur.
Editor: Darius Said.
Graphics: Jeremy Jozwik, Ken York, Sergio Botero, Steve Bowers.
Select imagery/video supplied by Getty Images.
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.
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