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Free-Floating Exoplanets with Subsurface Oceans Could Sustain Life – Sci-News.com

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Dr. Manasvi Lingam from the Department of Aerospace, Physics and Space Sciences at the Florida Institute of Technology and Professor Avi Loeb of Harvard University have studied how life might survive on free-floating, or rogue, planets — interstellar planetary-mass objects without a host planetary system — via oceans prevalent underneath a thick layer of ice.

An artist’s impression of a free-floating exoplanet. Image credit: Sci-News.com.

The cold of interstellar space would be too much for the oceans to remain entirely liquid, but Dr. Lingam and Professor Loeb believe any putative biospheres would be protected from the cold via the ice layer, and the planet’s core would heat the planet from the inside.

Underneath the ice would potentially exist Earth-like oceans that could support life.

The possibilities for rogue planets facilitating life are of deep interest to the authors as more planets are being discovered.

“For every solar system discovered, each of which contains a handful of terrestrial planets, there are approximately 30-40 rogue planets traveling in the cold expanses of interstellar space,” Dr. Lingam said.

“The nearest exoplanet to Earth is therefore expected to be one of these rogue planets.”

“We normally think of planets bound to stars, such as Mars, that could support life, but in reality, these types of life-supporting planets could just be floating out there in the vast void of space with rich biospheres.”

The next steps in the research are to do experiments on Earth to ascertain under what extreme conditions life could survive, such as low temperatures or low pressure.

A way of doing this is to analyze microbes that would not need sunlight, thereby building on previous research that has conclusively shown that more microbes exist that don’t require sunlight than those that do.

Another direction that merits future research is to look at free-floating interstellar objects as they enter our Solar System and to study the planet’s conditions to see if it would facilitate life.

“Technology would have to advance by only a modest amount to make traveling to these planets — if they are in our Solar System — easier,” Dr. Lingam said.

“You might be able to get to a rogue planet in a few decades, and, rather than looking for other planets around other stars, this might be the best chance to study these planets.”

“Through a combination of gravity assists and suitable propulsion systems, you could reach the rogue planet in 20 years or so.”

“Once you have a probe on the surface, you can beam the data back and it would probably take a few months to learn what it looks like on the surface.”

The team’s paper was published in the International Journal of Astrobiology.

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Manasvi Lingam & Abraham Loeb. 2019. Subsurface exolife. International Journal of Astrobiology 18 (2): 112-141; doi: 10.1017/S1473550418000083

This article is based on text provided by the Florida Institute of Technology.

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Russian crew returns from shooting the first feature film on the ISS – Yahoo Movies Canada

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Shooting for the first feature-length movie in space has wrapped. Space.com reports Russian actress Yulia Pereslid, producer Klim Shipenko and cosmonaut Oleg Novitskiy have returned to Earth after the first two spent 12 days filming their movie The Challenge aboard the International Space Station. The three left the ISS in a Soyuz spacecraft at 9:14PM Eastern on October 16th and landed in Kazakhstan just a few hours later, at 12:35AM.

Pereslid and Shipenko arrived on October 5th through an agreement between the Russian space agency Roscosmos, the TV network Channel One and the production studio Yellow, Black and White. Novitskiy had been there since April 9th as part of his regular duties, although he also played a key role — the movie has Pereslid play a surgeon who makes an emergency visit to the ISS to operate on the cosmonaut.

The filming required significant sacrifices for some of the ISS crew. NASA astronaut Mark Vande Hei and Russian cosmonaut Pyotr Dubrov were originally slated to return aboard the Soyuz capsule, but both have had their stays extended by six months to accommodate the film producers. Vande Hei will set a record for the longest spaceflight by a US astronaut as a result, spending exactly one year in orbit. Pereslid also broke ground as the first professional actor to visit space, beating William Shatner by roughly a week.

It will be a while before The Challenge is ready to watch, and it’s safe to say the production is aimed primarily at a Russian audience. It’s a major milestone for private uses of space, though, and hints at a future when Tom Cruise and other stars are frequently blasting off to produce shows in orbit.

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Russian actor, director arrive back on earth from ISS – Euronews

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A Soyuz space capsule carrying a cosmonaut and two Russian filmmakers has returned to Earth after leaving the International Space Station (ISS) earlier on Sunday.

The capsule landed on the steppes of Kazakhstan carrying Russian actor Yulia Peresild and film director Klim Shipenko, who returned to Earth after filming scenes for the world’s first movie in orbit – a project the Kremlin said would help burnish the nation’s space glory.

Peresild and Shipenko rocketed into orbit in a Russian Soyuz spacecraft on October 5 for a 12-day stint on the station to film segments of the movie titled “Challenge,” in which a surgeon played by Peresild rushes to the space station to save a crew member who needs an urgent operation in orbit.

The pair returned to Earth on Sunday with another Russian cosmonaut, Oleg Novitskiy, who also stars as the ailing cosmonaut in the movie.

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VIDEO: NASA’s asteroid hunter Lucy soars into sky with diamonds – Abbotsford News

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A NASA spacecraft named Lucy rocketed into the sky with diamonds Saturday morning on a 12-year quest to explore eight asteroids.

Seven of the mysterious space rocks are among swarms of asteroids sharing Jupiter’s orbit, thought to be the pristine leftovers of planetary formation.

An Atlas V rocket blasted off before dawn, sending Lucy on a roundabout journey spanning nearly 4 billion miles (6.3 billion kilometers). Researchers grew emotional describing the successful launch — lead scientist Hal Levison said it was like witnessing the birth of a child. “Go Lucy!” he urged.

Lucy is named after the 3.2 million-year-old skeletal remains of a human ancestor found in Ethiopia nearly a half-century ago. That discovery got its name from the 1967 Beatles song “Lucy in the Sky with Diamonds,” prompting NASA to send the spacecraft soaring with band members’ lyrics and other luminaries’ words of wisdom imprinted on a plaque. The spacecraft also carried a disc made of lab-grown diamonds for one of its science instruments.

In a prerecorded video for NASA, Beatles drummer Ringo Starr paid tribute to his late colleague John Lennon, credited for writing the song that inspired all this.

“I’m so excited — Lucy is going back in the sky with diamonds. Johnny will love that,” Starr said. “Anyway, if you meet anyone up there, Lucy, give them peace and love from me.”

The paleoanthropologist behind the fossil Lucy discovery, Donald Johanson, had goose bumps watching Lucy soar — “I will never look at Jupiter the same … absolutely mind-expanding.” He said he was filled with wonder about this “intersection of our past, our present and our future.”

“That a human ancestor who lived so long ago stimulated a mission which promises to add valuable information about the formation of our solar system is incredibly exciting,” said Johanson, of Arizona State University, who traveled to Cape Canaveral for his first rocket launch.

Lucy’s $981 million mission is the first to aim for Jupiter’s so-called Trojan entourage: thousands — if not millions — of asteroids that share the gas giant’s expansive orbit around the sun. Some of the Trojan asteroids precede Jupiter in its orbit, while others trail it.

Despite their orbits, the Trojans are far from the planet and mostly scattered far from each other. So there’s essentially zero chance of Lucy getting clobbered by one as it swoops past its targets, said Levison of Southwest Research Institute, the mission’s principal scientist.

Lucy will swing past Earth next October and again in 2024 to get enough gravitational oomph to make it all the way out to Jupiter’s orbit. On the way there, the spacecraft will zip past asteroid Donaldjohanson between Mars and Jupiter. The aptly named rock will serve as a 2025 warm-up act for the science instruments.

Drawing power from two huge circular solar wings, Lucy will chase down five asteroids in the leading pack of Trojans in the late 2020s. The spacecraft will then zoom back toward Earth for another gravity assist in 2030. That will send Lucy back out to the trailing Trojan cluster, where it will zip past the final two targets in 2033 for a record-setting eight asteroids visited in a single mission.

It’s a complicated, circuitous path that had NASA’s science mission chief, Thomas Zurbuchen, shaking his head at first. “You’ve got to be kidding. This is possible?” he recalled asking.

Lucy will pass within 600 miles (965 kilometers) of each target; the biggest one is about 70 miles (113 kilometers) across.

“Are there mountains? Valleys? Pits? Mesas? Who knows? I’m sure we’re going to be surprised,” said Johns Hopkins University’s Hal Weaver, who’s in charge of Lucy’s black-and-white camera. “But we can hardly wait to see what … images will reveal about these fossils from the formation of the solar system.”

NASA plans to launch another mission next month to test whether humans might be able to alter an asteroid’s orbit — practice in case Earth ever has a killer rock headed this way.

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The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.

Marcia Dunn, The Associated Press


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