Money: Moon appears to be active below the surface, scientists say - PressFrom - Australia
  •   
  •   

MoneyMoon appears to be active below the surface, scientists say

19:17  15 may  2019
19:17  15 may  2019 Source:   washingtonpost.com

Moonquakes measured during Apollo missions suggest the Moon may still be tectonically active, study finds

Moonquakes measured during Apollo missions suggest the Moon may still be tectonically active, study finds Rumblings under the lunar surface captured by Apollo-era equipment might be signs that the Moon is still tectonically active, researchers say. The Moon was previously thought to be fairly geologically quiet, but a study published today in Nature Geoscience found moonquakes in the 1960s and 70s occurred near fault scarps, or small cliffs created by movement between fractured parts of the Moon's surface. This is more than a coincidence — the quakes were likely caused by slipping at these fracture points, said the study's lead author Tom Watters of the Smithsonian Institution.

The moon may be dynamic and tectonically active like Earth based on a new analysis revealed Monday of quakes measured by seismometers on “It means that the moon has somehow managed to remain tectonically active after 4.51 billion years,” said Smithsonian Institution planetary scientist

Some tremors deep below the surface likely were caused by Earth’s gravitational pull. The model is bolstered by what appears to be recent surface shifting of boulders Gravity measurements taken by the craft align with the presence of a sea 20 to 25 miles below the moon ’s surface , scientists say .

Moon appears to be active below the surface, scientists say © Ho/AFP/Getty Images This mosaic of many images taken by NASA’s Lunar Reconnaissance Orbiter shows wrinkle ridges in a region of the Moon called Mare Frigoris. These ridges add to evidence that the moon has an actively changing surface.

The moon may be dynamic and tectonically active like Earth based on a new analysis revealed Monday of quakes measured by seismometers on the moon from 1969 and 1977.

Researchers examining the seismic data gathered during NASA’s Apollo missions traced the location of some of the quakes to step-shaped cliffs called scarps on the lunar surface that formed relatively recently, in geological terms, because of the ongoing shrinking of the moon as its hot interior cools.

New study suggests the Moon may be shrinking

New study suggests the Moon may be shrinking Earth isn't the only place that "quakes." Rocky planets and moons regularly experience similar movements, and faults can form between massive chunks of crust on other worlds the same as they can here on Earth.Related 

Locked away beneath the surface of Mars are vast quantities of water ice. The more pristine the ice, and the closer it is to the surface , the less energy it takes to extract and use. "On Mars, when you see something bright, it usually means ice,” says Richard Zurek, chief scientist for the Mars Program

Some tremors deep below the surface likely were caused by Earth’s gravitational pull. The model is bolstered by what appears to be recent surface shifting of boulders near these faults. Even though the moon lacks tectonic plates, he said , the team’s use of the phrase “tectonically active ” is sound

“It means that the moon has somehow managed to remain tectonically active after 4.51 billion years,” said Smithsonian Institution planetary scientist Thomas Watters, who led the research published in the journal Nature Geoscience.

Earth’s tectonic activity is driven by its hot interior. The moon, which orbits our planet at a distance of about 239,000 miles, has a diameter of about 2,160 miles, a bit more than a quarter of Earth’s diameter.

Images from NASA’s Lunar Reconnaissance Orbiter showed that the moon has delicately shriveled as its interior has cooled over the eons, like a plump grape transforming into a smaller raisin. As a result, it has acquired thousands of small surface wrinkles in the form of surface features called thrust-fault scarps.

NASA’s initiative to put a woman on the Moon is named Artemis, after Apollo’s twin sister

NASA’s initiative to put a woman on the Moon is named Artemis, after Apollo’s twin sister Oh my goddess

For example, the moon barely spins, yet it appears to have the sort of equatorial bulge caused by rotation. The measurements that emerged help explain how the moon acquired its shape, the researchers say . Its squashed appearance is probably a result of the gravitational process called tidal

Below The Surface on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, Music, Sports, Science and more, Sign up and share your playlists. Moon appears to be active below the surface , scientists say .

Related Slideshow: An exploration of the planets in our Solar System (Provided by Photo Services)

These faults push one part of the lunar crust up and over the adjoining part, said University of Maryland geologist and study co-author Nicholas Schmerr. They can reach up to about 330 feet tall and extend for many miles.

“This is exciting as it wasn’t clear if the moon had already gone through this period billions of years ago and was tectonically dead, or if it was still active in the present,” Schmerr said.

U.S. astronauts placed seismometers on the lunar surface during the Apollo 11, 12, 14, 15 and 16 missions, recording 28 shallow quakes up to almost 5 magnitude, which is moderate strength. Eight quakes occurred close to faults. Other events such as meteorite impacts can produce quakes, but those would produce different seismic signatures.

Boulder movements and disturbed soil near the scarps also indicated tectonic activity.

Watters said experts must be mindful that quakes may strike near these scarps when planning sites for future lunar exploration and a long-term human presence on the moon.

The moon is not the solar system’s only object shrinking with age. The innermost planet, Mercury, boasts many thrust faults.

Read more

Astronauts Could Live In Tunnels On The Moon, NASA Scientist Claims.
A scientist from NASA claims that astronauts can live inside tunnels found beneath the moon’s surface, allowing them to stay protected from lunar temperatures and solar radiation. In a Twitter post a few days ago, President Donald Trump announced that under his administration, NASA is going to be great again. He said he wants NASA to send astronauts to the Moon and then to Mars. This budget, according to Space.com, is meant to help NASA send a manned mission to the lunar south pole in 2024. This mission, according to agency chief Jim Bridenstine, will be called “Artemis.

—   Share news in the SOC. Networks

Topical videos:

usr: 0
This is interesting!