Small, Hardy Planets most likely to Survive Death of their Stars

White dwarf illustration.
Credit: © Dreamframer / Adobe Stock

Small, hardy planets packed with dense elements have the best chance of avoiding being crushed and swallowed up when their host star dies, new research from the University of Warwick has found.

Astrophysicists from the Astronomy and Astrophysics Group have modelled the chances of different planets being destroyed by tidal forces when their host stars become white dwarfs and have determined the most significant factors that decide whether they avoid destruction.

Their ‘survival guide’ for exoplanets could help guide astronomers locate potential exoplanets around white dwarf stars, as a new generation of even more powerful telescopes is being developed to search for them...

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Flu virus’ best friend: Low Humidity


Low humidity increases influenza disease through caspase-1/11 activation. WT Mx1 mice or caspase-1/11 KO Mx1 mice were preconditioned at 10% and 50% RH for 5 d and challenged with aerosolized hvPR8 at 2 × 105pfu/mL for 15 min (n = 6 mice per group). (A and B) Weight loss was monitored for 14 d. Data are representative of four experiments and means ± SEM *P < 0.05; one-way ANOVA; Student’s t test.

Yale researchers have pinpointed a key reason why people are more likely to get sick and even die from flu during winter months: low humidity. While experts know that cold temperatures and low humidity promote transmission of the flu virus, less is understood about the effect of decreased humidity on the immune system’s defenses against flu infection.

The Yale research team, led by Ak...

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Quantum world-first: Researchers reveal accuracy of Two-Qubit calculations in Silicon

Professor Andrew Dzurak and team
Wister Huang, a final-year PhD student in Electrical Engineering; Professor Andrew Dzurak; and Dr Henry Yang, a senior research fellow.

The research, carried out by Professor Andrew Dzurak’s team in UNSW Engineering, was published in the journal Nature. The experiments were performed by Wister Huang, a final-year PhD student in Electrical Engineering, and Dr Henry Yang, a senior research fellow at UNSW.

“All quantum computations can be made up of one-qubit operations and two-qubit operations – they’re the central building blocks of quantum computing,” says Professor Dzurak.

“Once you’ve got those, you can perform any computation you want – but the accuracy of both operations needs to be very high.”

In 2015 Dzurak’s team was the first to build a quantum logic gate in silicon,...

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Shrinking Moon may be Generating Moonquakes

Evidence for moonquakes on Lee-Lincoln fault scarp
The Taurus-Littrow valley is the location of the Apollo 17 landing site (asterisk). Cutting across the valley, just above the landing site, is the Lee-Lincoln fault scarp. Movement on the fault was the likely source of numerous moonquakes that triggered events in the valley. 1) Large landslides on of slopes of South Massif draped relatively bright rocks and dust (regolith) on and over the Lee-Lincoln scarp. 2) Boulders rolled down the slopes of North Massif leaving tracks or narrow troughs in the regolith on the slopes of North Massif. 3) Landslides on southeastern slopes of the Sculptured Hills.
Credits: NASA/GSFC/Arizona State University/Smithsonian

A new analysis suggests that the moon is actively shrinking and producing moonquakes along thousands of cliffs called thrust faults spr...

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