Europe

What would alien astronomers think of Earth? New study has answers

https://sputniknews.com/20221016/what-would-alien-astronomers-think-of-earth-new-study-has-an-answer-1101890682.html

feedback@sputniknews.com

+74956456601

MIA “Russia Segodnya”

2022

sputnik international

feedback@sputniknews.com

+74956456601

MIA “Russia Segodnya”

news

en_EN

sputnik international

feedback@sputniknews.com

+74956456601

MIA “Russia Segodnya”

https://cdnn1.img.sputniknews.com/img/107637/03/1076370338_666:0:3333:2000_1920x0_80_0_0_f0446230edf7b633ed8396e8f9c283ea.jpg

sputnik international

feedback@sputniknews.com

+74956456601

MIA “Russia Segodnya”

Earth, space, aliens, exoplanets

Earth, space, aliens, exoplanets

apply

India

Ever wondered how our planet looks for someone? We humans tend to care what others think of us, but this new study It’s like looking at the Earth from the other side.

If aliens were watching our planet, would they know if there was life there? In a study led by the Zurich Department of Physics, scientists have found the answer. Yes, but there are conditions.

According to a study titled “Earth as an exoplanet: II.” Finding evidence of life on Earth may depend on the seasons that hypothetical alien scientists choose to make observations, according to “Time-Varying Heat Emissions of the Earth and Atmospheric Seasonality of Biomarkers”. I have.

Jan Noël Mettler, a PhD student at the Zurich Department of Physics, and his fellow researchers study the infrared radiation spectrum and the effects of different observation geometries on it in order to see the planet from the outside. Did.

“We have learned that there is a large seasonal variation in the Earth’s thermal emission spectrum and that there is a strong spectral signature of biomarkers such as N2O, CH4, O3 and CO2. [nitrous oxide, methane, ozone and carbon dioxide] It is highly dependent on both season and viewing geometry,” said the study. read.

The study investigated four different geometries centered on the North and South Poles, one centered on the African equator, and one centered on the Pacific equator. And each perspective yielded different results, with scientists concluding that “there are large seasonal variations in the Earth’s thermal emission spectrum, and the strength of the biosignature absorption features is highly dependent on both season and viewing geometry.” attached.

Aside from seasonal variations that affect observations, so is the geometry of observations. Variation in measurements appeared to be greater over land than over sea.

Among the many challenges facing researchers, one thing is certain: the Earth is too dynamic to be characterized by a single thermal emission spectrum.

“Using the Earth as a testbed, we learned that planets and their properties cannot be described by a single thermal emission spectrum, but we need multi-epoch measurements, preferably both reflected light and thermal emission.”

Scientists say there is still much work to be done.

“Future work is needed to investigate how cloud fractions, cloud seasonality, and their thermodynamic phase characteristics affect atmospheric seasonality detection and outcomes.” concludes the article.

The perspectives provided by this study support the fact that it is important to consider various factors when searching for extraterrestrial life.



https://sputniknews.com/20221016/what-would-alien-astronomers-think-of-earth-new-study-has-an-answer-1101890682.html What would alien astronomers think of Earth? New study has answers

Show More
Back to top button