30 de octubre de 2020
ÚLTIMAS NOTICIAS:
Hispanic World

"Ultra-Hot Neptune," new exoplanet 260 light years from Earth

Santiago, Sep 21 (efe-epa).- An investigation headed by Chilean scientists has discovered the first so-called "Ultra-Hot Neptune," a type of exoplanet considered to be a "rare beast" and located 260 light years from Earth, a distance that is relatively close by in astronomical terms, even though it takes light from it 260 years to reach us.

 The exoplanet (seen here in an artist's conception) is scientifically designated LTT9779b, is a little larger than Neptune but has double the mass and, because it orbits so close to its star, the temperature in its atmosphere is about 1,700 C (over 3,000 F). EFE-EPA/--

The exoplanet (seen here in an artist's conception) is scientifically designated LTT9779b, is a little larger than Neptune but has double the mass and, because it orbits so close to its star, the temperature in its atmosphere is about 1,700 C (over 3,000 F). EFE-EPA/--

Santiago, Sep 21 (efe-epa).- An investigation headed by Chilean scientists has discovered the first so-called "Ultra-Hot Neptune," a type of exoplanet considered to be a "rare beast" and located 260 light years from Earth, a distance that is relatively close by in astronomical terms, even though it takes light from it 260 years to reach us.

The planet, which bears the scientific name LTT9779b, is a little larger than the seventh planet from the sun - Neptune, a gas giant - but it has twice the mass, a similar density and orbits so close to its star that its year lasts just 19 hours and the temperature of its atmosphere is greater than 1,700 degrees C (3,000-plus F).

The exoplanet orbits only about 5 percent of the distance from the Sun to Mercury, the hottest planet in the Solar System and the closest one to the sun.

According to the scientific paper published on Monday in the prestigious magazine Nature, the temperature of this newly discovered heavenly body provides scientists with a unique opportunity to study the atmospheres of planets outside the Solar System.

At a similar temperature, the heavy elements can be ionized in the atmosphere and the molecules broken down. This provides scientists with a unique laboratory for studying the chemistry of planets outside the Solar System, according to the leader of the investigation, James Jenkins, a professor with the Astronomy Department at the Physical Sciences and Mathematics Faculty of the state-run Universidad de Chile.

The exoplanet was detected by the Transiting Exoplanet Survey Satellite (TESS), which since its launch in April 2018 has been observing different sectors of the sky - 13 zones in the Southern Hemisphere during its first year in operation and then 13 zones in the Northern Hemisphere in its second year.

LTT9779b is located in the so-called Neptune Desert, an area in the radio and wavelength bands where Neptune-like worlds are rarely found, according to the Nature article.

The exoplanet is a "rare beast" because it exists in a zone of space that is sparsely populated by gas-giant planets of its kind - that is, the region very, very close to their parent stars - and finding such a world in that region is highly unusual, according to the investigation.

The parent star that the exoplanet orbits is about half the age of the Sun, that is to say about two billion years old, and given the intense radiation so close to it scientists did not expect to find a Neptune-like object there that has been able to hold on to its atmosphere for such a long time.

Normally, intense radiation of that kind would strip the atmosphere from any planet orbiting so close to its star.

LTT9779b has an atmosphere with a mass equivalent to three times the mass of Earth. However, because the planet is so close to the star, the radiation from the star should have destroyed it quickly. The question is "How could the exoplanet maintain its atmosphere for such a long time?" Jenkins said.

According to the publication, future studies of the exoplanet's atmosphere could shed light on some of the current mysteries about how this kind of planet forms, how they evolve and the details of their composition.

EFE

Histórico de noticias
Zeta downgraded to post-tropical storm after leaving 5 dead in southern US

Miami, Oct 29 (efe-epa).- Zeta, which on Wednesday made landfall on the Louisiana coast as a Category 2 hurricane, was downgraded to a post-tropical storm...

Economy, Covid-19 are focus in Biden-Trump duel for Florida

Miami, Oct 29 (efe-epa).- Five days before the US election and with more than 7.3 million votes already cast in Florida, President Donald Trump and...

Mexico's marigold "pulque" another way for the living to remember the dead

By Miquel Muñoz

Hathaway: We should keep authoritarians in films, not running our countries

By David Villafranca

"Wall of Hope" in Peru where people write what they want to do after pandemic

By Fernando Gimeno

Republicans accuse Twitter of censoring and anticonservative bias

Washington, Oct 28 (efe-epa).- The CEOs of Facebook, Google and Twitter - Mark Zuckerberg, Sundar Pichai and Jack Dorsey, respectively - on Wednesday faced...

US accuses 8 of being illegal Chinese gov't agents, harassing dissident

New York, Oct 28 (efe-epa).- The United States on Wednesday charged eight people with being illegal agents for the Chinese government and conducting an...

Leopoldo Lopez: I will return to liberate Venezuela

By Alida Juliani

All Souls Day bread a tradition in southern Mexico

By Juan Jesus Cortes

The US South, a legacy of slavery at the polls

By Susana Samhan

Mexico's Caribbean coast on red alert for Hurricane Zeta

Cancun, Mexico, Oct 26 (efe-epa).- Mexico's Caribbean coast on Monday was placed on red alert with the approach of Tropical Storm Zeta, which according to...

Bolivian court nullifies arrest order for Morales on terrorism charges

La Paz, Oct 26 (efe-epa).- A Bolivian court has annulled several elements of the court proceedings for alleged crimes such as terrorism and sedition against...

Scientists find clear evidence of frozen water on Moon

By Carmen Rodriguez

The unstoppable decline of US after four years of Trump

By Julio Cesar Rivas, Rosa Jimenez and Jesus Centeno

Tropical Storm Zeta gains strength en route to Yucatan

Miami, Oct 25 (efe-epa).-Tropical Storm Zeta, which formed on the weekend in the Caribbean and is heading toward the Yucatan Peninsula with sustained winds...

Deported Mexicans trust Biden: He owes us immigration reform

By Eduard Ribas i Admetlla

Covid-19 cases around Pence rise to 5, but he maintains travel schedule

Washington, Oct 25 (efe-epa).- The new outbreak of Covid-19 in the White House has now affected five people around Vice President Mike Pence, but his office...

Foreign hackers threatening US elections again

By Marc Arcas

Sofia Coppola, Bill Murray return in "On The Rocks" with Woody Allen style

Los Angeles, Oct 23 (efe-epa).- Filmmaker Sofia Coppola and actor Bill Murray are teaming up again after their success in "Lost in Translation" to make "On...

Cuban dance adjusts to the pandemic's new normal

By Yeny Garcia

Venezuelans stranded in Dominican Republic desperately seeking to return home

By Maria Montecelos

Ecuadorian security forces use tear gas to disperse Quito protesters

Quito, Oct 22 (efe-epa).- Ecuadorian police on Thursday used tear gas to disperse a demonstration in Quito called by a union to protest the country's...

Giuliani defends self against sexually compromising scene in "Borat" film

Los Angeles, Oct 22 (efe-epa).- President Donald Trump's personal attorney, former New York Mayor Rudy Giuliani, defended himself on Thursday after...

Russia, Iran deny US charges of election meddling

Moscow, Oct 22 (efe-epa).- The governments of Russia and Iran rejected on Thursday accusations from Washington that they are trying to influence the outcome...