Archive for the ‘space’ category: Page 621

Jun 23, 2019

Scientists have discovered a sea of fresh water under the ocean

Posted by in categories: climatology, space

Thousands of years ago, glaciers covered much of the planet. Oceans receded as water froze in massive sheets of ice blanketing the North American continent. As the ice age ended, glaciers melted. Massive river deltas flowed out across the continental shelf. The oceans rose, and fresh water was trapped in sediments below the waves. Discovered while drilling for oil offshore in the 1970s, scientists thought these “isolated” pockets of fresh water were a curiosity. They may instead prove to be a parched world’s newest source of fresh water.

As told in the latest issue (paywall) of the peer-reviewed journal Scientific Reports, scientists from Columbia University and the Woods Hole Oceanographic Institution spent 10 days on a research ship towing electromagnetic sensors from New Jersey to Massachusetts. By measuring the way electromagnetic waves traveled through fresh and saline water, researchers mapped out fresh-water reservoirs for the first time.

It turns out the subterranean pools stretch for at least 50 miles off the US Atlantic coast, containing vast stores of low-salinity groundwater, about twice the volume of Lake Ontario. The deposits begin about 600 ft (183 m) below the seafloor and stretch for hundreds of miles. That rivals the size of even the largest terrestrial aquifers.

Jun 23, 2019

Scientists Discover an ‘Unexpectedly Simple’ Formula Behind The Nature of Water Drops

Posted by in categories: mathematics, physics, space

Scientists have discovered an unexpectedly simple formula that governs one of the most seemingly unknowable limits in physics: determining how much of an electric field a water droplet can withstand before it will burst.

This infinitesimal phenomenon has been studied by physicists for decades, but while the overall concept may be easy to imagine, discerning the mathematical relationships that underpin such electrified explosions has been anything but.

Now that it’s been figured out, scientists say this one formula could lead to new advancements in everything from space propulsion to mass spectrometry, high-resolution printing, air purification, molecular analysis, and more.

Jun 23, 2019

Traverse City To International Space Station, Do You Read?

Posted by in category: space

A group of Traverse City students will kick off their summer vacation with an otherworldly experience – making radio contact with the International Space Station and interviewing NASA astronaut Nick Hague live as he’s in orbit. The special event is one of several opportunities for students to participate in science, nature, and STEM programs this summer in Traverse City.

The Traverse Area District Library’s (TADL’s) Summer Reading Club was chosen through a national competitive application process to be one of 13 U.S. organizations that will host a radio contact event with the International Space Station (ISS) between now and December. Only three libraries were selected, and TADL is the only Michigan-based organization invited to participate. “The closet other events are in Pennsylvania and Missouri,” says TADL Marketing and Communications Manager Matt Wiliford.

Students will talk with ISS crew members via amateur radio on Friday (June 28) from the McGuire Room at the library. Doors will open at 9am, with the event starting at 9:30am. Former NASA astronaut Greg Johnson will be in attendance to discuss his own trips to ISS, then members of the Cherryland Amateur Radio Club will provide an overview of the equipment being used to make radio contact with ISS. At 10:02am, direct radio contact will occur between NA1SS (ISS) and W8TCM (Traverse City). Eight students have been chosen to ask one question each of their own, then a second question submitted by community members through the library’s “Ask an Astronaut” submission contest. TADL staff helped curate the questions to cover a variety of topics and provoke thoughtful conversation, according to Wiliford.

Jun 23, 2019

This Bizarre Device Will Help Rescue Injured Astronauts on the Moon

Posted by in category: space

The European Space Agency (ESA) just tested out a device that’s meant to assist in astronaut rescue missions on the surface of the Moon. The strange contraption, dubbed the Lunar Evacuation System Assembly, is a pyramid-like structure that can be operated by a single astronaut to extricate a fallen comrade — the world’s first, according to the ESA.

The gadget is meant to save incapacitated astronauts by lifting them onto a mobile stretcher. According to an ESA statement, the device can be “transported like a golf caddy.”

“There is no way an astronaut could carry their fallen crewmate over their shoulder while wearing an [extravehicular activity] EVA suit,” said ESA head of spacewalk training Hervé Stevenin in the statement.

Jun 22, 2019

Mind-blowing Moon Tour!

Posted by in category: space

🤯 AWESOME! NASA has just released a 4K video tour of Earth’s moon and the footage will make your jaw drop. Credit: NASA (You can also read about this here:…Wydp6i5AjE)

Jun 22, 2019

NASA Rover on Mars Detects Puff of Gas That Hints at Possibility of Life

Posted by in category: space

The Curiosity mission’s scientists picked up the signal this week, and are seeking additional readings from the red planet.

Jun 22, 2019

A new coating material that could help reduce thermal noise on gravity wave detector mirrors

Posted by in categories: physics, space

A team of researchers from the University of Glasgow, the University of Strathclyde and Hobart and William Smith Colleges has developed a new coating for mirrors used on gravity detectors that is 25 times less noisy than mirror surfaces used on LIGO. In their paper published in the journal Physical Review Letters, the group describes how they made it and how well it performed during testing.

The mirrors used in gravity wave detectors are positioned at the ends of its arms. Coherent light rays are reflected from both mirrors and interfere with each other. Gravitational waves are measured by noting how much the mirrors shift, resulting in slight changes in length of the arms to which they are attached, to an accuracy of 10–16 cm. As impressive as that is, researchers want to improve the sensitivity of the detectors used at LIGO/Virgo, even after the recent upgrade.

To that end, members of the European Union have begun developing plans for the construction of what the Einstein Telescope, a gravitational wave with sensitivity 100 times higher than LIGO/Virgo. But for that to happen, improvements in the design of the current are required. One of those improvements is reducing the amount of thermal fluctuations in the mirror coatings. In this new effort, the researchers claim to have done just that.

Jun 22, 2019

Is the universe a hologram?

Posted by in categories: holograms, physics, space

Are you — is every person you’ve ever loved, every incredible sight you’ve ever witnessed — part of a hologram? Some scientists think so.

They argue that all the information in the universe may be stored on some sort of two-dimensional object. In this video, NASA astronomer Michelle Thaller delves into frontier science — an unchartered territory that may require a new level of physics to better understand.

Jun 22, 2019

Buzz Aldrin reminds world that he took first space selfie

Posted by in category: space

First selfie in space.

Jun 21, 2019

Algae ‘Bioreactor’ on Space Station Could Make Oxygen, Food for Astronauts

Posted by in categories: food, space

An algae-powered bioreactor, called the Photobioreactor, arrived at the International Space Station on May 6 and represents a major step toward so-called closed-loop life-support systems, which could one day sustain space crews during long-duration missions to the moon and Mars.