International
Learn about seven important NASA discoveries
October 15 |
As part of the commemoration of the discovery of the exoplanet Kepler 452-b, by the National Aeronautics and Space Administration (NASA) of the United States (U.S.), this Sunday is worth knowing seven important discoveries of this U.S. agency in recent years.
The cosmic body identified by the Kepler telescope, to which it owes its name, was confirmed by NASA on July 23, 2015.
Kepler-452b is an exoplanet, a planet revolving around a star other than the Sun, which in this case is a G2-type yellow dwarf, which is known as Kepler-452.
The agency responsible for the civil space program, as well as for aeronautical and aerospace research, since its foundation in 1958 has developed space exploration and science projects, which have led to relevant discoveries in several aspects.
1) The study of twins
In April 2019 NASA published the controversial results of an investigation known as the Twins Study.
A set of ten teams of researchers from the United States (U.S.) set out to observe the changes that might occur to a human being when exposed to the risk of traveling into space for a year.
The scientists compared a wide range of samples and measurements from identical twin brothers, retired astronauts Scott Kelly and Mark Kelly. Scott was sent into space, while Mark remained on Earth.
One of the results revealed the lengthening of the space-bound twin’s telomeres, special features at the ends of each strand of DNA that generally shorten with age, which demonstrated how a human body can adapt to a variety of changes generated by the environment of outer space flight.
2) Observing the Earth from space
There are a wide variety of scientific studies based on images that NASA crew members take using Crew Earth Observations (CEO).
NASA’s orbiting space station carries its crew and cameras over different points on Earth at different times and the station revisits the sites at varying intervals, allowing images of many areas to be collected at different times of the day and night.
In this way experts discovered that artificial lighting at night affects the behavior of urban wildlife, according to a study of light levels in the city of Chicago that was based on images taken by astronauts from the International Space Station (ISS).
3) A revealing microscope
A miniaturized fluorescence microscope made it possible to observe changes in living cells in microgravity.
This microscope enables real-time analysis of cell behavior during long-duration spaceflight. Its rapid imaging capability allows monitoring of cellular and molecular reactions that can happen more rapidly in altered gravity environments.
The implementation of real-time analysis methods on the station furthers the understanding of how cells in the human body react and adapt to the space environment.
4) The universe in better resolution
NASA’s Neutron Star Interior Composition Explorer (Nicer) facilitates measurements with excellent precision of neutron stars, objects containing ultra-dense matter at the threshold of black hole collapse.
In early 2018 JAXA’s All-Sky X-ray Imaging Monitor (MAXI) captured a new transient X-ray source in the sky designated MAXI J1820 + 070.
Nicer began monitoring the source and discovered that it was a binary black hole system with a mass much larger than that of the Sun. In addition, recorded measurements have revealed how the inner edge of a black hole’s accretion disk (and the corona above it) vary in size and shape as a black hole consumes material from a companion star.
5) Spaceflight decreases crew performance on Earth.
Astronauts’ bodies adapt to microgravity while in space. When crew members return to Earth, they show significant decreases in manual dexterity, multitasking, motion perception, and the ability to operate a vehicle.
NASA researchers confirmed that the post-flight performance decline was related to spaceflight factors and not to other factors such as lack of practice or sleep.
6) Cement in space
Another discovery confirmed by NASA suggests the possibility of building places to live on the Moon or Mars.
It is a research called Microgravity Investigation of Cement Solidification (MICS), which reveals that samples processed in space show considerable changes in the microstructure of cement compared to those processed on Earth, such as increased porosity, or the presence of more open spaces.
Showing that cement can harden in space is of great importance for future lunar constructions.
7) Keep it clean
New materials are needed to slow the growth and spread of bacteria resistant to antibiotics and silver coatings, according to research called Biorisk-KM-Metally, conducted by the Russian space agency (Roscosmos) and confirmed by NASA.
The researchers conducted tests on an antimicrobial coating called AGXX® and compared it with silver and stainless steel coatings. For the study, crew members placed 12 plates on the space station’s toilet door, with one plate coated in each tested material to be collected at six, 12 and 19 months.
In all time lapses, the experts found that the AGXX® coating had significantly fewer bacteria than surfaces coated with silver and stainless steel. These data are useful for the development of ideal technologies to reduce the risk of biological damage to space hardware and equipment.
International
Chile enters runoff campaign with Kast leading and Jara seeking a last-minute comeback
Chile’s presidential runoff campaign for the December 14 election kicked off this Sunday, with far-right candidate José Antonio Kast entering the race as the clear favorite in the polls, while left-wing contender Jeannette Jara faces an uphill scenario, hoping for a comeback that some experts describe as “a miracle.”
The final polls released in Chile—published before the mandatory blackout on survey dissemination—give Kast, an ultraconservative former lawmaker running for president for the third time, a lead of between 12 and 16 points. His opponent, the communist former minister in Gabriel Boric’s current administration, is weighed down not only by the government’s low approval ratings but also by a fragmented electorate.
Although Jeannette Jara received the most votes in the first round with 26.9%, her lack of alliances beyond the left makes it difficult for her to expand her support. Kast, who secured 23.9%, has already brought key figures on board: ultralibertarian Johannes Kaiser (13.9%) and traditional right-wing leader Evelyn Matthei (12.4%), both now backing his candidacy.
Analysts note that although Kast’s support base consolidates more than 50% of the electorate, it does not guarantee an automatic transfer of votes. Populist economist Franco Parisi, who placed third with 19.7%, emerges as the major wildcard. His party, the People’s Party (PDG), is set to decide this Sunday through an internal consultation whether to endorse one of the two finalists.
International
Trump says asylum decision freeze will remain in place “for a long time”
U.S. President Donald Trump warned on Sunday that the suspension of decisions on asylum applications—implemented as part of his order to “halt” immigration from third-world countries following Wednesday’s shooting in Washington—will remain in effect “for a long time.”
The president declined to specify how long the freeze, imposed last Friday by the U.S. Citizenship and Immigration Services (USCIS), would last. The suspension affects individuals waiting for an asylum ruling from that agency, though it does not apply to cases handled by U.S. immigration courts.
The delay is part of a series of measures enacted by the Trump Administration after a shooting on Wednesday in which an Afghan national allegedly opened fire on the National Guard in Washington, D.C., killing one officer and leaving another in critical condition.
Trump has ordered a permanent halt to immigration from 19 countries classified as “third-world.” He also indicated on Sunday that “possibly” more nations could be added to the list.
“These are countries with high crime rates. They are countries that do not function well… that are not known for success, and frankly, we don’t need people from those places coming into our country and telling us what to do,” Trump said, adding: “We don’t want those people.”
USCIS had already announced on Thursday a “rigorous review” of green cards held by migrants from 19 “countries of concern,” including Afghanistan, Cuba, Venezuela, and Haiti.
International
Sri Lanka and Indonesia deploy military as deadly asian floods kill over 1,000
Sri Lanka and Indonesia deployed military personnel on Monday to assist victims of the devastating floods that have killed more than a thousand people across Asia in recent days.
A series of weather events last week triggered prolonged torrential rains across Sri Lanka, parts of Indonesia’s Sumatra island, southern Thailand, and northern Malaysia. Indonesian President Prabowo Subianto said Monday in North Sumatra that “the priority now is to deliver the necessary aid as quickly as possible.”
“There are several isolated villages that, with God’s help, we will be able to reach,” he added. Subianto also stated that the government had deployed helicopters and aircraft to support relief operations.
Floods and landslides have claimed 502 lives in Indonesia, with a similar number still missing.
This marks the highest death toll from a natural disaster in Indonesia since 2018, when an earthquake and subsequent tsunami killed more than 2,000 people.
The government has sent three military ships carrying aid and two hospital vessels to the hardest-hit regions, where many roads remain impassable.
In the village of Sungai Nyalo, located about 100 kilometers from Padang, the capital of West Sumatra, floodwaters had receded by Sunday, leaving homes, vehicles, and crops coated in thick mud.
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