Space telescope offers rare glimpse of Earth-sized rocky exoplanet

An artist's conception of an exoplanet beyond our own solar system known to astronomers as LHS 3844b, which lies about 48.6 light years from Earth is shown in this handout photo obtained August 19, 2019. (NASA-JPL/Handout via REUTERS)
Updated 20 August 2019
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Space telescope offers rare glimpse of Earth-sized rocky exoplanet

  • LHS 3844b, an exoplanet about 1.3 times the size of Earth, is locked in a tight orbit around a small, relatively cool star called a red dwarf

Direct observations from a NASA space telescope have for the first time revealed the atmospheric void of a rocky, Earth-sized world beyond our own solar system orbiting the most common type of star in the galaxy, according to a study released on Monday.
The research, published in the scientific journal Nature, also shows the distant planet’s surface is likely to resemble the barren exterior of the Earth’s moon or Mercury, possibly covered in dark volcanic rock.
The planet lies about 48.6 light years from Earth and is one of more than 4,000 so-called exoplanets identified over the past two decades circling distant stars in our home galaxy, the Milky Way.
Known to astronomers as LHS 3844b, this exoplanet about 1.3 times the size of Earth is locked in a tight orbit — one revolution every 11 hours — around a small, relatively cool star called a red dwarf, the most prevalent and long-lived type of star in the galaxy.
The planet’s lack of atmosphere is probably due to intense radiation from its parent red dwarf, which, though dim by stellar standards, also emits high levels of ultraviolet light, the study says.
The study will likely add to a debate among astronomers about whether the search for life-sustaining conditions beyond our solar system should focus on exoplanets around red dwarfs — accounting for 75% of all stars in the Milky Way — or less common, larger, hotter stars more like our own sun.
The principal finding is that it probably possesses little if any atmosphere — a conclusion reached by measuring the temperature difference between the side of the planet perpetually facing its star, and the cooler, dark side facing away from it.
A negligible amount of heat carried between the two sides indicates a lack of winds that would otherwise be present to transfer warmth around the planet.
“The temperature contrast on this planet is about as big as it can possibly be,” said researcher Laura Kreidberg of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. She is lead author of the study. Similar analysis previously was used to determine that another exoplanet, 55 Cancri e, about twice as big as Earth and believed to be half-covered in molten lava, likely possesses an atmosphere thicker than Earth’s. This exoplanet, unlike LHS 3844b, orbits a sun-like star.
The planet in the latest study was detected last year by NASA’s newly launched Transiting Exoplanet Survey Satellite, an orbiting telescope that pinpoints distant worlds by spotting periodic, dips in the light observed from their parent stars when an object passes in front of them.
But it was follow-up observations from another orbiting instrument, the Spitzer Space Telescope, which can detect infrared light directly from an exoplanet, that provided new insights about its features.

 


Huawei in public test as it unveils sanction-hit phone

Updated 19 September 2019

Huawei in public test as it unveils sanction-hit phone

  • Hit by US sanctions, Huawei's Mate 30 will not be allowed to use Google’s Play Store
  • Household-name services like WhatsApp, Instagram and Google Maps will be unavailable.
BERLIN: Chinese tech giant Huawei launches its latest high-end smartphone in Munich on Thursday, the first that could be void of popular Google apps because of US sanctions.
Observers are asking whether a phone without the Silicon Valley software that users have come to depend on can succeed, or whether Huawei will have found a way for buyers to install popular apps despite the constraints.
The company has maintained a veil of secrecy over its plans, set to be dropped at a 1200 GMT press conference revealing the Mate 30 and Mate 30 Pro models.
Huawei, targeted directly by the United States as part of a broader trade conflict with Beijing, was added to a “blacklist” in Washington in May.
Since then, it has been illegal for American firms to do business with the Chinese firm, suspected of espionage by President Donald Trump and his administration.
As a result, the new Mate will run on a freely available version of Android, the world’s most-used phone operating system that is owned by the search engine heavyweight.
While Mate 30 owners will experience little difference in the use of the system, the lack of Google’s Play Store — which provides access to hundreds of thousands of third-party apps and games as well as films, books and music — could hobble them.
Household-name services like WhatsApp, Instagram and Google Maps will be unavailable.
The tech press reports that this yawning gap in functionality has left some sellers reluctant to stock the new phones, fearing a wave of rapid-fire returns from dissatisfied customers.
Huawei president Richard Yu said at Berlin’s IFA electronics fair this month that his engineers found a “very simple” way to install the hottest apps without going via the Play Store.
Huawei could offer its own app store in a preliminary version, setting itself up as a competitor to the dominant Apple and Google offerings, observers speculate.
Over the longer term, the company could build out a similar “ecosystem” of devices, apps and services as the Silicon Valley companies that would bind users more closely to it.
The world’s second-largest smartphone maker after Samsung, Huawei earlier this month presented its proprietary operating system HarmonyOS, a potential replacement for Android.
The Mate 30 will not yet have HarmonyOS installed.
But it could make for a new round in the decades-old “OS wars” between Microsoft’s Windows and Apple’s Mac OS, then Android versus Apple’s iOS.
Meanwhile, Eric Xu, current holder of Huawei’s rotating chief executive chair, has urged Europe to foster an alternative to Google and Apple.
That could provide an opening for Huawei to build up Europe’s market of 500 million well-off consumers as a stronghold against American rivals.
“If Europe had its own ecosystem for smart devices, Huawei would use it... that would resolve the problem of European digital dependency” on the United States, Xu told German business daily Handelsblatt.
He added that his company would be prepared to invest in developing such joint European-Chinese projects.