Monday, September 27

Exoplanetas

atmósfera, Espacio, Exoplanetas, hidrogeno, Noticias, planeta, planetas, tierra, vida extraterrestre

New exoplanets will guide search for extraterrestrial life | Digital Trends Spanish

Researchers at the University of Cambridge, in England, discovered a new class of exoplanets that, according to them, would be excellent targets for the search for extraterrestrial life. These celestial bodies were called Hycean planets and are covered by oceans with atmospheres rich in hydrogen, which makes them so different from those on Earth. "These planets open a new avenue in our search for life elsewhere," says Nikku Madhusudhan, principal investigator at the Cambridge Institute of Astronomy. "It is exciting that habitable conditions can exist on planets so different from Earth," he adds. The researchers also indicate that this important finding "could mean that finding biosignatures of life outside our solar system in the next two to three years is a real possibility." According...
descubrimientos, Espacio, Exoplanetas, james webb, K2-141b, Noticias, Planetas lava

K2-141b: an exoplanet with an ocean of lava and a rocky atmosphere | Digital Trends Spanish

Among the most surprising discoveries that scientists have made in space, outside the Solar System, are the lava planets: rocky planets that orbit very close to their star and where temperatures are so high that the rock that makes them up melts in form lava and vaporizes in the atmosphere. One of these is K2-141b, discovered by the Kepler mission, whose characteristics were published in the most recent issue of Monthly Notices of the Royal Astronomical Society. It is about half the size of the Earth and is characterized by having a surface, an ocean and an atmosphere made up of rocks. Julie Roussy, McGill Graphic Design and Getty Images As explained on the site Space, the proximity of this exoplanet with respect to its star keeps it gravitationally locked in place, that is, the s...
carl sagan, Espacio, estrellas, Exoplanetas, investigacion, linea de vision, NASA, Noticias, observacion, órbita, satélite, Sistema Solar, tierra

Some exoplanets may be watching us | Digital Trends Spanish

It is possible that our planet is currently being observed from billions of kilometers away. Is it a disturbing idea? A group of astronomers has pointed out that some exoplanets, that is to say planets beyond our Solar System, have a direct line of sight to observe the biological properties of the Earth from very far away. Astronomers from the Carl Sagan Institute of Cornell and Lehigh University have identified 1,004 stars similar to our Sun that could contain Earth-like planets that would be able to detect the chemical traces of life on our planet. The article was already published in the Monthly Bulletin of the Royal Astronomical Society and is titled "What Stars Can See Earth as a Transiting Exoplanet?" "Let's reverse the point of view of other stars and ask from what point of...
Enanas Blancas, Espacio, Exoplanetas, Noticias, Sistema Solar, sol

They discover the first planet that survived the death of its sun | Digital Trends Spanish

A consortium of astronomers discovered the first giant exoplanet that was able to survive the death of its sun and continue to orbit the white dwarf that its parent star became. The finding from the Association of Research Universities in Astronomy (Aura) shows that it is possible for planets the size of Jupiter to survive the disappearance of their star and settle into close orbits around the remaining stele, close to the habitable zone. The research also predicts what could happen in the Solar System, when the Sun ages and becomes a white dwarf. Astronomers used the Gemini International Observatory, a program of NOIRLab, among other telescopes in the world and in space, to find and characterize a giant planet, 13.8 times larger than Jupiter, orbiting a white dwarf star. This is t...
carbono, Diamantes, Espacio, Exoplanetas, Noticias, silice, Universidad de Arizona

Diamond Planets: Scientists Test Amazing Theory | Digital Trends Spanish

Some planets far from the solar system could be made of diamonds, says a study published by researchers from Arizona State University. According to astronomers, these exoplanets could also form silica, an oxide of silicon found as quartz in nature. "These exoplanets are unlike anything in our solar system," lead author Harrison Allen-Sutter said in a statement. The scientist explains that when stars and planets are formed, they do so from the same gas cloud, so their general composition is similar. A star with a lower carbon-oxygen ratio will have planets like Earth, composed of silicates and oxides with a very small diamond content (Earth's diamond content is about 0.001%). Illustration of a carbon-rich planet with diamonds and silica as the main minerals. Water can turn a carbi...
Espacio, Exoplanetas, inteligencia artificial, Noticias, planetas

With artificial intelligence they discover 50 new planets | Digital Trends Spanish

A machine learning algorithm, a form of artificial intelligence, has confirmed the existence of fifty potential planets. The mechanism, developed by British scientists, analyzed a sample of potential planets captured by different telescopes, accurately confirming which were real and which were false positives. The findings justify the use of multiple validation techniques, including a machine learning algorithm, when statistically confirming future exoplanet discoveries, according to the study published in the monthly journal of the Royal Astronomical Society. False positives Many exoplanet studies search the large amounts of data provided by telescopes for signals from planets passing between the telescope and their star, a phenomenon better known as transit. However, ...
eclipse lunar, Espacio, Exoplanetas, hubble, luna, Noticias

They use the Moon to capture stunning selfie of the Earth | Digital Trends Spanish

As the best selfie of the Earth in a mirror, the work carried out by a group of astrophysicists who is exploring new methods to look for traces of life on other planets was described. The group used the Hubble Space Telescope to try to see Earth as if it were an exoplanet, that is, a celestial body orbiting a star many light-years away. To do this, the researchers used the Moon as a giant mirror, recording sunlight that passed through Earth's atmosphere, bounced off the lunar surface, and returned. "It's like what an astronaut could see standing on the surface of the moon," explained Allison Youngblood, research scientist at the Laboratory for Atmospheric and Space Physics (LASP) of the University of Boulder Colorado. Although previous studies have treated Earth as an exoplanet, th...
Espacio, Exoplanetas, Noticias, Sistema Solar, vida extraterrestre

They calculate the maximum number of habitable planets per system | Digital Trends Spanish

Seven is the maximum number of celestial bodies similar to Earth, capable of harboring life, that could exist in other planetary systems, in the absence of a gas giant like Jupiter. This is the conclusion of a University of California Riverside study, led by astrobiologist Stephen Kane and published in the Astronomical Journal. The search for life in outer space generally focuses on what scientists call the “habitable zone,” as it is called the area around a star in which a planet could have oceans of liquid water, a key condition for life. as we know it. Kane had studied a nearby solar system called Trappist-1, which has three Earth-like planets in its habitable zone. Comparison of the Solar System with the Trappist-1 System University of California Riverside "This mad...