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Yes, exoplanets can have oxygen without alien life


Yes, exoplanets can have oxygen without alien life
Exploring the wonders of the Cosmos, one mystery at a time.
Exploring the wonders of the Cosmos, one mystery at a time.
The discovery of life on another world would be a monumental moment in the history of human civilization. The most likely way we will, one day, find alien life will be discovering chemical markers of life in the atmosphere of planets orbiting distant stars.
One of these markers is oxygen, which currently makes up a little over 20 percent of the atmosphere of our own world. However, our own world held onto relatively little oxygen until 2.4 billion years ago, when oxygen-producing cyanobacteria filled the atmosphere with the gas, leading to the first widespread extinction — the Great Oxidation event. Many lifeforms on Earth today, including human beings, are now dependent on this life-giving gas. ....

United States , Joshua Krissansen Totton , Peter Gabriel , Jonathan Fortney , Lauren Weiss , Scott Lambros , University Of Hawaii , Department Of Astronomy , Great Oxidation , James Webb Space Telescope , Sagan Fellow , ஒன்றுபட்டது மாநிலங்களில் , பீட்டர் கேப்ரியல் , ஜொனாதன் போர்திணேய் , லாரன் வெயிஸ் , பல்கலைக்கழகம் ஆஃப் ஹவாய் , துறை ஆஃப் வானியல் , நன்று ஆக்ஸைடேஶந் , ஜேம்ஸ் வலை இடம் தொலைநோக்கி , சாகன் சக ,

New Technique Used to Spot Possible Super-Earth in Alpha Centauri's Habitable Zone


EVAN GOUGH, UNIVERSE TODAY
13 FEBRUARY 2021
Astronomers using a new technique may have not only found a super-Earth at a neighbouring star, but they may also have directly imaged it. And it could be nice and cozy in the habitable zone around Alpha Centauri.
 
It s much easier to see giant planets than Earth-size planets. No matter which detection method is being used, larger planets are simply a larger needle in the cosmic haystack. But overall, astronomers are very interested in planets that are similar to Earth. And finding them is much more difficult.
We thought we d have to wait for the ultra-powerful telescopes currently being built before we could directly image exoplanets. ....

Kevin Wagner , Alpha Centauri , Proxima Centauri , Yuri Milner , Nature Communications , University Of Arizona , Giant Magellan Telescope , European Extremely Large Telescope , Sagan Fellow , New Earths , Alphacen Region , European Southern Observatory , Very Large Telescope , Breakthrough Watch , Very Large , Breakthrough Initiatives , Solar System , Thirty Meter Telescope , Amp Quot , கெவின் வாக்னர் , ஆல்பா செண்ட Au ரி , யூரி மில்னர் , இயற்கை தகவல்தொடர்புகள் , பல்கலைக்கழகம் ஆஃப் அரிசோனா , ராட்சத மேஜெல்யாந் தொலைநோக்கி , ஐரோப்பிய மிகவும் பெரியது தொலைநோக்கி ,