Category Astronomy/Space

A new way to wobble: Scientists uncover mechanism that causes formation of planets

An artist’s concept of a supermassive black
An artist’s concept of a supermassive black hole surrounded by an accretion disk. (Illustration courtesy of NASA)

Instead of a tempest in a teapot, imagine the cosmos in a canister. Scientists have performed experiments using nested, spinning cylinders to confirm that an uneven wobble in a ring of electrically conductive fluid like liquid metal or plasma causes particles on the inside of the ring to drift inward. Since revolving rings of plasma also occur around stars and black holes, these new findings imply that the wobbles can cause matter in those rings to fall toward the central mass and form planets.

The scientists found that the wobble could grow in a new, unexpected way...

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Why is there no life on Mars? Rover finds a clue

Despite brief oases, Mars was likely doomed to be a desert planet, a new study suggests
Despite brief oases, Mars was likely doomed to be a desert planet, a new study suggests.

Why is Mars barren and uninhabitable, while life has always thrived here on our relatively similar planet Earth?

A discovery made by a NASA rover has offered a clue for this mystery, new research said Wednesday, suggesting that while rivers once sporadically flowed on Mars, it was doomed to mostly be a desert planet.

Mars is thought to currently have all the necessary ingredients for life except for perhaps the most important one: liquid water.

However, the red surface is carved out by ancient rivers and lakes, showing that water once flowed on our nearest neighbor.

There are currently several rovers searching Mars for signs of life that could have existed back in those more habitable t...

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New Horizons conducts first-ever successful deep space stellar navigation test

First successful deep-space demonstration of stellar navigation

As NASA’s New Horizons spacecraft traveled through the Kuiper Belt at a distance of 438 million miles from Earth, an international team of astronomers used the far-flung probe to conduct an unprecedented experiment: the first-ever successful demonstration of deep space stellar navigation.

A paper describing the results was accepted for publication in The Astronomical Journal. The pre-print is available on the server arXiv.

As a proof-of-concept test, the researchers took advantage of the spacecraft’s unique vantage point as it traveled toward interstellar space to image two of our nearest stellar neighbors, Proxima Centauri, which is 4.2 light-years from Earth, and Wolf 359, which is 7.86 light-years away.

From New Horizons’ perspective, the two nearby stars shifted their app...

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Clingy planets can trigger their own doom, Cheops and TESS suggest

How planets orbiting close to their host stars can cause their own downfall by triggering flares
How planets orbiting close to their host stars can cause their own downfall by triggering flares

Astronomers using the European Space Agency’s Cheops mission have caught an exoplanet that seems to be triggering flares of radiation from the star it orbits. These tremendous explosions are blasting away the planet’s wispy atmosphere, causing it to shrink every year.

This is the first-ever evidence of a “planet with a death wish.” Though it was theorized to be possible since the nineties, the flares seen in this research are around 100 times more energetic than expected.

The work is published in the journal Nature.

This planet’s star makes our sun look sleepy
Thanks to telescopes like the NASA/ESA/CSA James Webb Space Telescope and NASA’s Transiting Exoplanet Survey Satellite (TESS...

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