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
Ukraine declares nationwide energy emergency amid russian attacks and extreme cold
The Ukrainian government on Wednesday declared a nationwide energy state of emergency amid continued Russian military attacks and extreme winter weather, with nighttime temperatures dropping as low as minus 18 degrees Celsius.
“The consequences of Russian attacks and worsening weather conditions are severe (…) Overall, a state of emergency will be declared for Ukraine’s energy sector,” Ukrainian President Volodymyr Zelensky said in a statement posted on social media following a meeting with senior officials.
Zelensky announced the creation of a “permanent coordination headquarters” to manage the crisis in the capital, Kyiv, and tasked former defence minister and current energy chief Denys Shmyhal with overseeing support efforts for affected individuals and communities, including addressing power outages, heating shortages and other “practical issues.”
“There are many problems that require urgent solutions,” the president said, noting that repair crews, energy companies, municipal services and the State Emergency Service are working “around the clock” to restore electricity supplies. Kyiv has been particularly affected after Russian strikes last Friday disabled key parts of the power grid, as daytime temperatures hover around minus 12 degrees Celsius and plunge to minus 18 at night.
Zelensky added that public authorities will “maximize efforts with partners to obtain the necessary equipment and additional support,” while the government will ensure “maximum deregulation of all processes” to speed up the connection of backup power equipment to the grid. He also confirmed that work is underway to significantly increase electricity imports into Ukraine.
The Ukrainian leader further instructed his Cabinet to review curfew regulations in light of the extreme cold, arguing that citizens must have the greatest possible access to assistance centers, while businesses should be given flexibility to plan their operations according to the state of the energy system.
International
France joins Denmark’s ‘Operation Arctic Resistance’ in Greenland amid U.S. tensions
French President Emmanuel Macron confirmed in the early hours of Thursday (Wednesday afternoon in El Salvador) that France will take part in “Operation Arctic Resistance,” after Denmark announced it would expand its military presence in Greenland amid rising tensions with the United States over Washington’s stated ambitions regarding the semi-autonomous territory.
“At Denmark’s request, I have decided that France will participate in the joint exercises organized by Denmark in Greenland, ‘Operation Arctic Resistance,’” Macron said in a brief message posted on social media at 5:18 p.m.
The French president added that “the first French military elements are already on their way, with others to follow,” though he did not specify the number of troops being deployed or the scale of France’s planned contribution.
The governments of Sweden, Norway and Germany have also confirmed the deployment of military contingents to Greenland. Germany’s armed forces will send a 13-member reconnaissance team to the Greenlandic capital, Nuuk, to take part in a mission scheduled to run from Thursday through Saturday, according to the German Ministry of Defence.
Denmark’s announcement came shortly before a Danish delegation met at the White House with U.S. Vice President JD Vance and Secretary of State Marco Rubio to discuss Washington’s plans regarding Greenland. Copenhagen said the military activities would be carried out “in close cooperation with NATO allies.”
International
Iran closes airspace amid U.S. threats and deadly nationwide protests
Iranian authorities closed the country’s airspace in the early hours of Thursday, according to data from flight-tracking website FlightRadar24, amid growing threats of a possible U.S. attack as protests across the country continue and have reportedly left thousands dead.
According to FlightRadar24, the Iranian government suspended all flights to and from the country, except for international flights that have received special authorization. The notice was initially issued for a duration of just over two hours.
The move comes after U.S. President Donald Trump in recent days threatened to strike Iran if its security forces failed to halt the deaths linked to weeks-long protests that began in Tehran and later spread to other Iranian cities. Despite the threats, the White House said diplomacy remains Trump’s preferred option.
Speaking from the Oval Office on Wednesday, Trump claimed that “the deaths in Iran have stopped” and said there would be no executions of protesters following his warnings to Tehran. He added that his administration would seek to verify those claims.
“I’ve been told the deaths in Iran are stopping. They’ve stopped, and that there are no plans for executions,” Trump told reporters, cautioning that the United States would be “very upset” if those assurances proved to be untrue.
The statements contrast with reports from rights groups. The Norway-based NGO Iran Human Rights (IHRNGO) said on Wednesday that more than 3,400 people have been killed since the protests erupted. Meanwhile, Kurdish-Iranian rights group Hengaw reported this week that a 26-year-old Iranian man, Erfan Soltani, was facing execution as of Wednesday.
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