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
Venezuela accuses U.S. of using Naval Deployment to pressure Maduro government
The world’s largest aircraft carrier, the USS Gerald R. Ford, joined the U.S. Navy’s anti-drug operation in Latin America on Tuesday—a deployment Venezuela has condemned as an attempt to pressure President Nicolás Maduro from power.
In a statement, the U.S. Southern Command confirmed that the carrier, ordered to deploy nearly three weeks ago, has entered its area of responsibility, which includes Latin America and the Caribbean.
“The world’s largest aircraft carrier will strengthen the United States’ ability to detect, monitor, and dismantle illicit actors and activities that threaten the security and prosperity of U.S. territory and our safety in the Western Hemisphere,” said Pentagon spokesperson Sean Parnell.
According to the White House, the U.S. government under Donald Trump has carried out about twenty operations in the Caribbean and the Pacific since early September, resulting in the deaths of 76 suspected drug traffickers.
However, U.S. authorities have not yet presented evidence that the targeted vessels were being used for drug trafficking or posed a direct threat to the country.
The operations have raised concerns in Caracas, where the Maduro administration views the deployment as a strategic move aimed at provoking regime change in Venezuela.
International
Venezuela mobilizes forces nationwide as tensions with U.S. rise
Venezuela’s armed forces launched a “massive” nationwide deployment on Tuesday in response to what the government calls “imperialist threats” from the United States, which continues its anti-drug military operation in the region and is preparing for the arrival of its most advanced aircraft carrier.
Since late August, U.S. forces have maintained a growing presence in the Caribbean to combat alleged drug trafficking originating from Colombia and Venezuela. The operation has resulted in the bombing of 20 vessels in international waters in the Caribbean and Pacific, leaving 76 people dead.
Venezuelan authorities claim the U.S. mission is aimed at toppling President Nicolás Maduro. While insisting he seeks peace, Maduro has repeatedly warned the country is prepared to defend itself and has frequently showcased military activities.
A statement from Venezuela’s Defense Ministry said the deployment includes land, air, naval, river and missile systems; armed forces units; the Bolivarian militia; and additional police, military and civilian defense structures.
State broadcaster VTV aired speeches from military leaders in various states, along with images of troops mobilizing and equipment being positioned.
However, analysts note that these frequent and highly publicized announcements do not always lead to visible operations on the ground.
On Monday, Maduro cautioned that Venezuela has the “strength and power” to respond to any aggression, including mobilizing civilians. “If imperialism were to strike and do harm, from the moment the order is given, the entire Venezuelan people would mobilize and fight,” he warned.
International
Jara: “Real toughness” means targeting drug money in Chile’s crime fight
Left-wing presidential candidate Jeannette Jara said during Chile’s final debate on Monday that the “real tough approach” to crime is to go after the financial networks behind drug trafficking and organized crime.
Rising crime, often linked in public discourse to a surge in irregular migration, has become the top concern among Chileans and has dominated the election campaign.
Although Chile’s homicide rate has nearly tripled over the past decade — from 2.5 to 6.7 per 100,000 inhabitants — the country remains one of the safest in Latin America, according to the United Nations.
“I want to call on the right-wing candidates to join us in targeting those who control the money behind drug trafficking and organized crime. That is real tough action,” Jara, who is favored to win Sunday’s first-round vote, declared during the debate.
All eight candidates faced off on Monday night in the final televised confrontation before the election.
Polls — unavailable since they were suspended on November 2 — indicate that far-right candidate José Antonio Kast is likely to finish second behind Jara, but would hold the advantage in a potential December 14 runoff.
Kast is expected to consolidate support from three other right-wing contenders: Evelyn Matthei, Johannes Kaiser and Franco Parisi.
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