Discovering life in a planet

NASA on January 29 announced the discovery of many amino acids, ammonia and nucleobase, which is important for life in Bennu asteroid.

 

A sodium carbonate circuit looks like needles, colored purple for easy display, inside the Bennu asteroid sample. Each “needle” is less than 1 micrometer. Image: Rob Wardell/Tim McCoy/Smithsonian

The planet Bennu is the target of the Osiris-Rex (NASA) ship launched into the space in 2016. The ship successfully collected a sample from Bennu and brought them to the Utah desert in 2023.

The latest findings published in two studies in the magazine Nature and Nature Astronomy On January 29, bringing some surprises, and raising many interesting questions. Most notably, the detection of 14 amino acids (out of 20 amino acids creates essential proteins for life on Earth), ammonia high concentration and 5 nucleobase that organisms live on Earth used for Earth for use to be used for Earth. Transmission of genetic information in DNA and RNA.

“The new discovery is not evidence of life, but they suggest that the necessary conditions for life to appear may have been popular throughout the early solar system. The ability that life may have been formed on other planets, ”said Nicky Fox, Deputy Manager at the Board of Directors of NASA scientific tasks, said at a press conference on January 29.

The press conference also revealed some other things about Bennu, and it is noteworthy that most of them suggest that this asteroid has suitable components for life. This raises a big question for scientists: Why is life not formed on Bennu?

For example, the team has identified evidence of saline saline with traces of 11 minerals rich in sodium carbonate, phosphate, sulfate, chloride and fluoride. The team also found a large amount of ammonia in the object from Bennu, namely about 230 ppm. This figure is about 100 times the natural ammonia level in the green planet, according to Danny Glavin, a senior scientist in the task of recovering the sample at the Goddard space flight center of NASA.

“Ammonia is of course necessary for many biological processes. It is likely that it is a key chemical construction block through the formation of amino acids, nucleobase, genetic components of DNA and RNA,” Glavin prefer.

This shows that Bennu – or at least the mother’s asteroids that Bennu separated – once existed in colder, more distant areas because ammonia volatile. In order for ammonia to exist in the form of salt, the environment must be cold.

Compared to the meteorites rushing through the atmosphere, burning and falling to the ground, the Osiris-Rex sample brought back still pristine, not contaminated with substances from the Earth thanks to the NASA measures that have been taken with the ship. “We are confident that the organic materials we are seeing in the planet are from the planet, not pollution. We can trust this result,” Glavin said.

Higher data quality is synonymous with a clearer answer, and more clear answers are often accompanied by additional questions. “For me, the question is: Why is life not formed on Bennu. What makes life not formed on some other celestial bodies?”, Fox questioned.

By Editor

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