For 30 years, astronomers in the world have sought in the exoplanets cosmos. Recently we arrive at a milestone now that more than 6,000 have been found.
In our solar system, Earth is one of the eight planets, nine if you really want to tell Pluto, and the only remotely hospitable for life.
But look beyond the gravitational pull of our sun towards the limits of interstellar space, and you will find an absolutely destroyed cosmic landscape with a large number of worlds of all sizes and characteristics. In fact, three decades were found since the first Exoplanet, NASA has registered a milestone of more than 6,000 worlds beyond our solar system.
And as technology progresses, astronomers only expect to continue discovering a broader variety of exoplanets amid the billions that are believed to exist. But even after 30 years of searching in the cosmos, a question continues to cancel scientists: are we alone in the universe?
“Is earth the only home for life? Or are there other habitable worlds waiting to be found?” A narrator says in a NASA video that promotes the milestone. “With every planet we discover, we approach that question.”
There is everything here to know about exoplanets, and why scientists believe that looking for them is the best way to discover if life exists anywhere else in the universe.
What is an Exoplanet?
Exoplanets are planets outside the solar system of the Earth. For that reason, these celestial bodies are sometimes also called extrasolar planets.
Some, called Rogue planets, do not even orbit a star, but float through the cosmos without ties.
How many exoplanets are there?
In 1995, a gas giant known as 51 Pegasi B, which orbits a star similar to the Earth’s sun, recorded his name in cosmic history as the first exoplanet discovered.
Since then, astronomers around the world have spent 30 years finding and confirming the existence of thousands of more exoplanets in the confines of the cosmos.
As of Monday, September 22, a total of 6,007 exoplanets have been confirmed, according to the NASA Exoplanet Institute, which monitors and tracks the exoplanets. Because the confirmed planets are added regularly to the count, no unique planet is considered the entry of the 6,000 position, NASA said in a press release in September announcing the achievement.
In addition, not only almost 8,000 additional exoplanet candidates expect official confirmation, but it is believed that there are billions, astronomers say.
How do exoplanet scientists find?
Both land -based cosmic observatories and space, including the space telescopes of James Webb and Hubble, are integral in the images and the collection of data on possible exoplanets.
Astronomers also anticipate that the new and future avant -garde missions could lead to the discovery of even more. That includes the next Roman Nancy Grace Space Telescope of the NASA, which is designed to discover thousands of new exoplanets mainly through a technique called gravitational microlence.
“This milestone represents decades of cosmic exploration driven by NASA’s space telescopes, the exploration that has completely changed the way in which humanity sees the night sky,” said Shawn Domagal-Goldman, interim director of the NASA Astrophysics Division, in a statement.
Have we found life in any exoplanet?
In short, not yet.
An exoplanet known as K2-18B achieved a degree of fame in April when an astronomer team claimed to have found in its atmosphere “the strongest evidence so far” that life exists in any other place in addition to the earth. Since then, other scientists have questioned the findings, putting a brake on the notion that humanity finally had evidence that we are not alone in the cosmos.
Are exoplanets similar to the Earth?
That is why astronomers are pressing, looking for a planet that looks a lot to the earth and, therefore, could house living organisms.
The cosmos can be the home of rocky and gaseous worlds that resemble planets in our solar system, but it is also full of incredible and strange planets that are nothing like those that orbit our sun. The universe is the home of the planets of the size of Jupiter who orbit closer to its matrix star than Mercury Orbit The Sun, and the planets that orbit two stars, as a call Kepler-16b that has made comparisons with the tattoo in “Star Wars”.
Astronomers have also discovered the coldest exoplanet that has been photographed to date, 14 Herculis C, which is approximately seven times Jupiter’s mass and as cold as 26 degrees Fahrenheit. By way of comparison, most planets are thousands of degrees Fahrenheit.
There are also planets like Wasp-193b, which is bigger than Jupiter but light and dim as cotton of sugar, and inhospitable worlds like Wasp-107B, where sandy clouds in the atmosphere fall like rain on the surface.
But in the midst of these thousands of worlds, “there is one that we have not found, a planet like ours,” according to NASA’s video over exoplanets.
“At least, not yet.”
Eric Lagatta is the Space Connect reporter for the USA Today Network. Communicate with him to elagatta@gannett.com
(Tagstotranslate) Astronomers
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