A Second Earth Found?

5fish

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Here is a planet that seems to match up with ours in many ways...


This potential planet, Proxima Centauri d, is referred to as a “sub-Earth” or a planet substantially less massive than Earth or Venus, by researchers. Since astronomers conventionally wait for independent confirmation before officially introducing new planets into their catalogues, Proxima Centauri d is currently only a “planet candidate.”


In 1584, Italian friar Giordano Bruno argued that other stars had planets of their own and that those planets had inhabitants. He had no real proof of his claims — they just felt true. But they were heretical enough to get the attention of the Roman Catholic Church. The Inquisition arrested Bruno, put his tongue in a vice, and burned him at the stake.

Then, in 1995, astronomers discovered 51 Pegasi b — a planet orbiting a sun-like star in the Pegasus constellation. Many scientists were skeptical at first; this planet was almost too strange to be believed. Though it was about the size of Jupiter, it was closer to its star than Mercury is to our sun. Most surprisingly, it completed its orbit in just 4 days


A great video about the research for the second earth... its short...


Here a short video about the sub-earth...

 

5fish

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No one is excited there a second earth like planet a mere 300 light years away... that is a hope skip and a jump in galactic time... You know the WEBB telescope can tell the atmosphere of faraway planets...
 

5fish

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Here is how the James Webb telescope can find other earth's out in space... and life?


Spectroscopy is simply the science of measuring the intensity of light at different wavelengths. The graphical representations of these measurements are called spectra, and they are the key to unlocking the composition of exoplanet atmospheres.

When a planet passes in front of a star, the starlight passes through the planet's atmosphere. If, for example, the planet has sodium in its atmosphere, the spectrum of the star, added to that of the planet, will have what we call an "absorption line" in the place in the spectra where would expect to see sodium (see graphic below). This is because different elements and molecules absorb light at characteristic energies; and this is how we know where in a spectrum we might expect to see the signature of sodium (or methane or water) if it is present.

Why is an infrared telescope key to characterizing the atmospheres of these exoplanets? The benefit of making infrared observations is that it is at infrared wavelengths that molecules in the atmospheres of exoplanets have the largest number of spectral features. The ultimate goal, of course, is to find a planet with a similar atmosphere to that of Earth.



Fine Aliens?...


Obviously, there’s no hope of seeing animals, plants, or Klingons at the several light-years’ distance of even the nearest other star system. But what James Webb can do is snap photos of exoplanets – worlds that orbit other suns. Since 1995, astronomers have discovered more than four thousand exoplanets. But only a handful of these have been photographed. The overwhelming majority have been found by measuring the subtle effects they have on their host stars; either shaking them slightly or periodically blocking some of their light.

James Webb promises to do better: To make pictures of medium-size exoplanets. Worlds that are two to three times the diameter of Earth. The images would be disappointing to shutterbugs; the planet would only appear as a one-pixel dot. But astronomers have had nearly two centuries of experience teasing good information out of bad photos. They could pass the light from that dot through a high-tech prism, spreading it out into a rainbow, or spectrum. The detailed structure of that spectrum will tell them what’s in the planet’s atmosphere.
 

5fish

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Here seven earths around one star... think of the Sci Fi stories one can write...

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The TRAPPIST-1 star system is home to the largest batch of roughly Earth-size planets ever found outside our solar system. Discovered in 2016 some 40 light-years away, these seven rocky siblings offer a glimpse at the tremendous variety of planetary systems that likely fill the universe.

Here is NASA...


A 2021 study revealed more about TRAPPIST-1 planets. They are likely made of similar stuff, but they are different than Earth. That could mean they all contain about the same ratio of materials thought to compose most rocky planets, like iron, oxygen, magnesium, and silicon. But if this is the case, that ratio must be notably different than Earth's: The TRAPPIST-1 planets are about 8% less dense than they would be if they had the same makeup as our home planet.

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This artist's concept shows what the TRAPPIST-1 planetary system may look like, based on available data about the planets' diameters, masses and distances from the host star, as of February 2018. Credit: NASA/JPL-Caltech


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Artist’s depiction of the TRAPPIST-1 star and its seven worlds.
 

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Look @rittmeister , @O' Be Joyful , @jgoodguy , @Wehrkraftzersetzer... We came make it to Trappsipt-1 in a person lifetime with a starship...

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TRAPPIST-1 is a very close star, 39.1 ± 1.3 light-years (12.0 ± 0.4 pc) away from the Solar System as measured by parallax, and has a large proper motion. Dwarf stars like TRAPPIST-1 are over ten times more common than Sun-like stars and are also more likely to host small planets.

We can get there using tiny starships powered by solar sails... size of a cellphone...


Miniature spaceships the size of cellphones could fly across the solar system using sails propelled by lasers, which would allow the tiny spacecraft to reach much faster speeds — and, potentially, much more distant destinations — than conventionally powered rockets, a new study finds

Here...


A Russian Billionaire was going to back it...OOOps...


It won't be in our lifetime left... but our Grandchildren's
 
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