The Georgia peach may be vanishing, but its mythology is alive and well

This is a tough year for the Georgia peach. In February, growers fretted about warm winter temperatures, which prevented some fruit from developing properly. They were more discouraged in March after a late freeze damaged many of the remaining fruit. By May they were predicting an 80 percent crop loss. Now in July they are lamenting one of the worst years in living memory. With relatively few Georgia peaches this…

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Advanced Civilizations Could Build a Galactic Internet with Planetary Transits

In a recently published paper, Dr. Duncan Forgan proposed that alien civilizations could create a “galactic internet” by using artificial transits to communicate.
The post Advanced Civilizations Could Build a Galactic Internet with Planetary Transits appeared first on Universe Today. …

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Alphabay and Hansa Takedowns Ensnare Thousands of Dark Web Users

Cops sent unsuspecting users scrambling from one dark web site’s takedown to another site—that they controlled.

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Kaisa Matomäki Dreams of Primes

Kaisa Matomäki has proved that properties of prime numbers over long intervals hold over short intervals as well. The techniques she uses have transformed the study of these elusive numbers. …

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Is austerity really to blame for stalling life expectancy in England?

Over the 20th century, life expectancy in the UK increased from 46 to 76 years. But since 2010, that rate of increase is close to having ground to a halt. At any point in living memory this finding would cause serious concern. But in the age of austerity and accusations of “social murder” it is politically explosive. But can budget cuts really explain the trend? And can we do anything…

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Lions and lambs: can you solve this classic game theory puzzle?

How many lions does it take to kill a lamb? The answer isn’t as straightforward as you might think. Not, at least, according to game theory. Game theory is a branch of maths that studies and predicts decision-making. It often involves creating hypothetical scenarios, or “games”, whereby a number of individuals called “players” or “agents” can choose from a defined set of actions according to a series of rules. Each…

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Trump’s Election Integrity Committee Made All the Wrong Points

If you want to fix voting, don’t investigate fraud. Improve the outdated, insecure tech.

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Hey Map Collectors, Here’s a New Map of Pluto!

Using data from the New Horizons spacecraft, the mission team has created some new maps of Pluto and its largest moon, Charon.
The post Hey Map Collectors, Here’s a New Map of Pluto! appeared first on Universe Today. …

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One. More. Month: Our Guide to the Total Solar Eclipse

Get ready for the August 21st total solar eclipse, with facts, maps and more!
The post One. More. Month: Our Guide to the Total Solar Eclipse appeared first on Universe Today. …

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The Illuminating Geometry of Viruses

Mathematical insights into how RNA helps viruses pull together their protein shells could guide future studies of viral behavior and function. …

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Segway MiniPro Vulnerabilities Would Have Let Hackers Take Over the Hoverboard

The self-balancing scooter isn’t quite so steady when hackers take charge.

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Does the next industrial revolution spell the end of manufacturing jobs?

Robots have been taking our jobs since the 1960s. So why are politicians and business leaders only now becoming so worried about robots causing mass unemployment? It comes down to the question of what a robot really is. While science fiction has often portrayed robots as androids carrying out tasks in the much the same way as humans, the reality is that robots take much more specialised forms. Traditional 20th…

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Helicopter or lawnmower? Modern parenting styles can get in the way of raising well-balanced children

When many middle-aged people think back to their childhood, they remember roaming the streets with their friends during long, hot summers. Our parents threw us out the door in the morning and instructed us not to come back until dinnertime. Often in charge of younger siblings, we strayed further than we should have, got into trouble and, by the end of the summer, had a collection of triumphs, scars and…

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Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE (Samland et al.)

Vol. 603
In section 10. Planets and planetary systems

Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE

by M. Samland, P. Mollière, M. Bonnefoy, et al. A&A 603, A57

alt

51 Eridani b is a highly interesting planet discovered recently through direct imaging. It is young (20 Myr), nearby (30 pc), has a mass around ten times that of Jupiter, and an orbital distance of about 14 au. Most importantly, its angular separation makes it an excellent target for direct spectroscopic characterization. Samland et al. use SPHERE at the VLT to obtain a precise spectrum of the planet from 0.95 to 1.7 microns. The planet is outside of the color-color relations for brown dwarfs. Models indicate that it is cloudy and has a very high metallicity ([Fe/H]=1.0 +/- 0.1), significantly above that of its parent star. This latter implies that the atmosphere of 51 Eri b is as metal-rich as that of Saturn. Given the trend between increasing planetary mass and decreasing atmospheric metallicity in the solar system, this is a somewhat surprising result, but definitely a very significant one.

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Ancient Impacts Shaped the Structure of the Milky Way

According to a new study using data from the SDSS, ripples in the Milky Way’s disk may be indications of “ancient impacts” with other galaxies.
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Strange Radio Signals Detected from a Nearby Star

A recent survey conducted by the Arecibo Observatory detected a strange radio signal coming from Ross 128, a star system just 11 light-year from Earth.
The post Strange Radio Signals Detected from a Nearby Star appeared first on Universe Today. …

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This is the One of the Largest Structures We Know of in the Universe

Using data from the Sloan Digitial Sky Survey, an Indian team of astronomers has discovered one of the largest cosmic structures to date – the Saraswati Supercluster!
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Telescope Mounts and Eyepieces (Video)

Are you confused about the purpose of telescope mounts? What about eyepieces? What are they for? Watch today’s hangout to learn more! …

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